Government of India: Ministry of Civil Aviation

GOVERNMENT OF INDIA
MINISTRY OF CIVIL AVIATION

DIRECTORATE GENERAL OF CIVIL AVIATION
CNS
INSPECTOR HANDBOOK
Edition I Version II
Year 2018
DIRECTORATE OF AIR SPACE AND AIR-NAVIGATION

SERVICES STANDARDS (AS & ANSS)
OPP. SAFDARJUNG AIRPORT, AUROBINDOO MARG, NEW

DELHI - 110003
CNS INSPECTOR HANDBOOK i

TABLE OF CONTENTS
FOREWARD iii
RECORD OF AMENDMENTS iv
GLOSSARY OF TERMS AND ABBREVIALTIONS/ACRONYMS v
1. INTRODUCTION 1
2. STATUTORY AUTHORITY 1
3. OBJECTIVES OF SAFETY OVERSIGHT INSPECTION 3
4. SCOPE OF SAFETY OVERSIGHT INSPECTION 4
5. STAFF REQUIREMENT 4
6. THE ROLE OF INSPECTOR(S) 4
7. AUDITING/INSPECTION PRINCIPLES 4
8. TRAINING 8
9. INSPECTION TECHNIQUES 8
10. JOB DESCRIPTION 9
11. INSPECTION PROCEDURES 11
12. REPORT WRITING 13
13. FOLLOW UP ACTION 13
APPENDIX A – CNS CHECKLIST 15
CNS INSPECTOR HANDBOOK ii

FOREWORD
This Handbook has been prepared pursuant to powers granted to Director

General under SECTION 5A of the Aircraft Act 1934 in order to ensure safety
of aircraft operations and for the use and guidance of CNS Inspectors in the
performance of their duties.
This handbook laid down the standards and procedure to be followed by the
CNS Inspectors and a standardized method of inspection and reporting should
be ensured.
It is emphasized that all matters pertaining to an inspector‟s duties and

responsibilities cannot be covered in this Handbook. Inspectors are expected to
use good judgment in matters where specific guidance has not been given.
Comments and recommendations for revision/amendment action to this

publication should be forwarded to the Director of Operations of Air Space &
ANSS Directorate.
(J S RAWAT)
Jt. Director General
CNS INSPECTOR HANDBOOK iii

RECORD OF AMENDMENTS
Number Page affected Date Entered Entered by
CNS INSPECTOR HANDBOOK iv

GLOSSARY OF TERMS AND
ABBREVIATIONS/ACRONYMS
AIP AERONAUTICAL INFORMATION PUBLICATION
AIS AERONAUTICAL INFORMATION SERVICE
ANSP AIR NAVIGATION SERVICE PROVIDER
AS & ANSS AIR SPACE & AIR NAVIGATION SERVICES STANDARDS
ATM AIR TRAFFIC MANAGEMENT
CNS COMMUNICATION, NAVIGATION AND SURVEILLANCE
MET METEOROLOGICAL
PANS PROCEDURES FOR AIR NAVIGATION SERVICES
SAR SEARCH AND RESCUE
SMS SAFETY MANAGEMENT SYSTEM
CNS INSPECTOR HANDBOOK v

1. INTRODUCTION
Directorate of Air Space and Air Navigation Services and Standard (AS &
ANSS) has been formed within the ambit of Director General of Civil Aviation,
New Delhi, India to perform the safety oversight function in the matter
pertaining to ATM, PANS-OPS, AIS, ATCO Licensing, CNS, MET and SAR
field. Inspectors have been appointed within ANS Directorate who will carry out
their duties and responsibilities as per the policies laid down in this manual. The
Inspectors shall carry out the safety oversight of all aspects of ANS concerning
services, procedures, methods and functions of Air Navigation Service Provider
and their applicability in accordance with the rules & regulations of relevant
CARs, Manuals, and any other direction laid down in the documents.
2. STATUTORY AUTHORITY
2.1 Section 4 of The Aircraft Act 1934 empowers Central Government to make
rules to implement the Convention of 1944.
“Quote “
The Central Government may, by notification in the Official Gazette,
make such rules as appear to it to be necessary for carrying out the
Convention relating to International Civil Aviation signed at Chicago on
the 7th day of December, 1944 (including any Annex thereto relating to
international standards and recommended practices) as amended from
time to time.
“Unquote”
2.2 The Aircraft Rule 1937, Rule 29C stipulates the following regarding adoption
of the Convention & Annexes
(1) The Director-General may lay down standards and procedures not
inconsistent with the Aircraft Act, 1934 (22 of 1934) and the rules
made thereunder to carry out the Convention and any Annex
thereto.
CNS INSPECTOR HANDBOOK Page 1 of 15

(2) The Director-General shall formulate the State Safety Programme
and oversee its implementation.
2.3 The Aircraft Act 1934 mandates requirements for the certification, inspection
and regulation of communications, navigation and surveillance (CNS) or air
traffic management (ATM) facilities and licensing of persons engaged in air
traffic control. [Section 5 (2) (ga), (gb)].
2.4 Rule 156 of the Aircraft Rules, 1937 stipulates
156. Inspection ─
(1) The Director-General, or any officer of the Directorate General of Civil
Aviation authorized by him by general or special order in writing, may inspect
an aircraft or aviation facility for the purpose of granting an approval or a
certificate under these rules, and subsequently to carry out surveillance
including unannounced inspections to ensure continued compliance with these
rules.
(2) The Director-General may authorize any person, subject to such conditions
as may be specified by the Director-General, for the purpose of examining,
and testing any person or aircraft or inspecting any document or aviation
facility for the purpose of grant of a license or a certificate or an approval
under these rules or the provisions of the Aircraft Act, 1934 (22 of 1934) and
such authorization shall specify the functions of the person so authorized to
perform on behalf of the Director-General and the said authorization shall be
for a period as specified therein.
(3) The persons so authorized under sub-rules (1) and (2) shall be issued
credentials and shall perform the functions as assigned to them in the
authorization.
(4) The Director-General or the person referred to in sub-rule (1) and sub-rule
(2) –

(a) shall have unrestricted and unlimited access to aircraft and aviation
facilities, as applicable, for the performance of their functions and
duties under these rules;
(b) may enter, inspect and search any aircraft or any aviation facility,
including air navigation services, and also interact with any personnel,
and inspect documents and records for the purpose of securing
compliance with these rules and the provisions of the Aircraft Act,
1934 (22 of 1934).
(5)The owner or operator of aircraft, organization or air navigation facility

shall allow the Director-General, or the person referred to in sub-rules (1) and
(2), access to any part of the aircraft, organization or air navigation facility
including equipment, records, documents and personnel, and shall co-operate
in conducting the activities referred in sub-rules (1) and (2).
[Substituted by GSR No. 1202 dated 23-7-1976

Amended by GSR No. 812(E) dated 21-11-2008
Substituted by GSR No. 832(E) dated 30-06-2017]
2.5 The activities of the ANS Officers/ Inspectors will be governed by the
following:
i) Civil Aviation Requirements and powers delegated vide SO 727 for

exercising the duties and functions;
ii) Airspace & ANSS Procedure Manual;
iii) Advisory Circulars, applicable AICs;
iv) Other relevant Directives and Instructions that may be issued from
time to time by the Director General.
3. OBJECTIVES OF SAFETY OVERSIGHT INSPECTION
3.1 The objectives of the safety oversight inspection are as follows:

a. Ascertain compliance with the Civil Aviation Requirement (CARs),
ICAO Standards and Recommended Practices and SMS procedures,
b. Ensure adherence with prescribed standards and procedures in the
provision of air traffic services,

c. Determine the effectiveness of safety planning in CNS operations and
highlight significant findings (where appropriate),
d. To identify areas for improvement in ANSS system.
4. SCOPE OF SAFETY OVERSIGHT INSPECTION
4.1 The scope of the Safety Oversight Inspection will mainly cover the four broad
components;
a. Personnel, Licensing & Training

b. Equipment / Materials / Environment
c. Procedures
d. Documentation
5. STAFF REQUIREMENT
ANSS Directorate shall make available a sufficient number of suitable CNS

Inspectors, with sound knowledge in related field, experienced, qualified and
having the capabilities to accomplish the wide range of safety oversight
activities, preparation of reports, follow up with the ANSP for the remedial
action/ mitigation of the observations. Guidance for the assessment of required
CNS Inspector has been included in the Methodology for the assessment of
manpower.
6. THE ROLE OF INSPECTOR(S)
The tasks to be undertaken by each inspection team member will be assigned by

the team leader. These tasks may include conducting interviews with staff of the
unit, section or division being inspected, reviewing documentation, observing
operations, and writing material for the inspection report.
7. AUDITING/INSPECTION PRINCIPLES
7.1 Four of the most important principles have been selected for safety oversight
purposes.
7.2 Ethics is seen as the philosophical study of moral values and rules, together with
the motivation based on the ideas of wrong and right. Ethics with respect to the
conduct of safety oversight audits/inspections is manifested in four ways which
are generally considered as the “Foundations of Professionalism”. Those four
most important principles selected for safety oversight purposes are:
i) Trust,
ii) Integrity,
iii) Confidentiality, and
iv) Discretion.
7.3 As Inspectors are always in the public eye, they are expected to exercise good
judgment, ethics and professional behavior at all times while on duty.
7.4 The following internationally accepted auditing principles shall be followed:
7.4.1 Transparency and disclosure:

Inspections conducted under the auditing process shall be fully
transparent and open for examination by the concerned. There
shall be full disclosure of final inspection reports .The reports
shall provide sufficient information for Service Provider to
understand the non-conformance and/or the deficiencies.
7.4.2 Timeliness:
Results of the inspections will be produced and submitted on a
timely basis, in accordance with a predetermined schedule for the
preparation and submission of inspections reports.
Service Providers shall submit their comments, action plan and

all documentation required for the inspection process within the
prescribed time.
7.4.3 All-inclusiveness:
The scope of the Safety Oversight Audit/Inspection Program
includes the relevant Civil Aviation Requirement, ICAO annexes,
prescribed standards and procedures, Directives of the Director

General in general and all the safety-related provisions in
particular. This also includes the guidance material and related
procedures and practices prescribed by ICAO in documents e.g.
DOC 4444, DOC 9426 etc.
7.4.4 In a systematic manner, with consistency and objectivity:

Safety oversight audits/inspections should be conducted in a
systematic, consistent and objective manner.
Standardization and uniformity in the scope, depth and quality of

inspections should be assured through an initial and refresher
training of all inspectors.
7.4.5 Fairness:
Inspections are to be conducted in a manner such that Service
Providers are given every opportunity to monitor, comment on,
and respond to the inspection process, and to do so within the
established time frame.
7.4.6 Quality:
Safety oversight audits/inspections will be conducted by
appropriately trained and qualified Inspectors and in accordance
with widely recognized auditing/inspections principles and
practices.
7.5 The Inspectors are required to conduct safety oversight audits/inspections on

the basis of the foundations of professionalism listed above.
7.6 Inspectors are required to reflect the values represented by these elements, in
their dealings with Service Providers and in performing their safety
oversight audit-related duties and responsibilities.
7.7 The following four additional auditing/inspections principles shall be

adopted and implemented as guiding principles in addition to the principles
prescribed above:

7.7.1 Fair presentation – the obligation to report truthfully and
accurately:
Inspection findings, conclusions and reports will be reflected

truthfully and accurately. Significant obstacles encountered
during the audit and unresolved diverging opinions between the
inspection team and the auditee (Service Provider) will be made
transparent by providing access to the full report including
comments of the Service Provider.
7.7.2 Due professional care – the application of diligence and judgment

in auditing:
Inspectors shall exercise care in accordance with the importance

of the task they perform and the confidence placed on them by
the Authority. Having the necessary competence is an important
factor in fulfilling this principle.
7.7.3 Independence – the basis for the impartiality of the audit and
objectivity:
Inspectors shall be independent of the activity being audited/

inspected and are free from bias and conflict of interest.
Inspectors are required to maintain an objective state of mind

throughout the inspection process to ensure that the inspection
findings and conclusions will be based only on the evidence.
7.7.4 Evidence-based approach – the rational method for reaching

reliable and reproducible inspection conclusions in a systematic
process:
Inspectors shall ensure that all evidence is verifiable. It shall be

based on samples of the information available, since an
inspection is conducted during a finite period of time and with
finite resources. The appropriate use of sampling will be closely
related to the confidence that can be placed in the inspection
conclusions.
7.8 To ensure that the above ethical conduct and principles are fully respected
and practiced by Inspectors, the Authority will ensure that safety oversight
inspectors are:
i. of an enthusiastic, constructive, objective, inquisitive and analytical

state of mind;
ii. patient and good listeners who can communicate at all levels
without arguing;
iii. of strong but diplomatic personality, able to make unpopular
decisions and yet maintain respect based on sound judgments;
iv. versatile and flexible persons, unbiased, not easily influenced but
respected by all; and
v. of pleasant and friendly character and who are able to quickly
establish a good rapport with concerned people at all levels.
8. TRAINING
Training of the CNS Inspector shall be carried out in accordance with the training
programme of the ANS Directorate as mentioned in the Training & Procedure
Manual for ANS.
9. INSPECTION TECHNIQUES
9.1 The techniques for gathering the information on which the inspection team‟s
assessment will be made include:
a. Review of documentation;
b. Interviews with staff; and
c. Observations by the inspector.
d. The inspection team should work systematically through the items on
the relevant checklists.
e. Observation should be noted on standard observation sheets.
9.2 The following guidelines may be followed by Inspectors:
9.2.1 The principal way in which inspectors obtain information about the
functioning of the systems is by asking questions.
9.2.2 The persons to be interviewed should be drawn from a range of

management, supervisory and operational positions.
9.2.3 The purpose of inspection interviews is to elicit information, not to

enter into discussions.
9.2.4 All Inspectors should observe the following guidelines relating to the
conduct of inspection interviews:
a. Listen attentively and let the speaker know you are listening.
b. Remain neutral. Do not disagree, criticize or interrupt.
c. Ask „W‟ questions – what, why, where, when, who, and how
these are the key words that will bring forward facts and
information.
10. JOB DESCRIPTION & QUALIFICATION
10.1 Name of the Office:- DGCA, Opposite Safdarjung Airport, New Delhi.
10.2 Title of Position:- CNS Inspector.
10.3 Service:- Technical
10.4 Directorate :- Airspace & ANSS Directorate
10.5 Reporting Officer:- Director of Operation ( Airspace & ANSS)
10.6 Brief Description of the Position and its Purpose: -
The holder of this position shall be responsible for performing Safety

Oversight function of CNS service providers in India i.e. Airports Authority of
India (AAI). The purpose of this position is to ensure the compliance of CAR
SECTION D; ICAO Annexes, relevant manuals, documents, DGCA rules/
regulations, directives to CNS service provider.

10.7 Duties and Responsibilities:-
10.7.1 To amend DGCA CAR from time to time to ensure compliance with
ICAO Annexures on the subject and/or issue any other directions, if
required.
10.7.2 To file differences with ICAO, if required.
10.7.3 Develop and amend CNS Inspector Handbook and Checklist

necessary for inspection.
10.7.4 Develop training program for inspectors.
10.7.5 Formulate and implement Annual CNS Safety Audit Surveillance

Program.
10.7.6 Carry out safety oversight inspection and surveillance of CNS service
provider as per the approved program and report deficiencies noted for
remedial action.
10.7.7 Prepare inspection report and highlight the deficiencies, if any for
appropriate remedial action by the CNS Service provider.
10.7.8 Assist if needed CNS service provider in preparing the

remedial/corrective action plan and follow up its progress.
10.7.9 To ensure flight safety, issue immediate directives to the CNS service
provider if there are any issues that need immediate attention.
10.7.10 Ensure CNS service provider has developed training programme

including refresher training for staff.
10.7.11 Ensure training records or files for staff are maintained.
10.7.12 Review documents, manuals related to CNS including amendments

received from CNS service provider and submit for approval.
10.7.13 Participate in any in-house and abroad workshops and seminars

related to CNS matters.

10.7.14 Perform any other duty assigned by the Director to enhance
performance of the directorate.
10.8 Qualification - A CNS Inspector should have the following qualifications:
10.8.1 The CNS Inspector should have atleast five years of technical work
experience in aeronautical telecommunication field after having
completed basic course in aeronautical telecommunication
maintenance or in bachelor in electronics and/or communication
engineering.
10.8.2 The inspector should have adequate knowledge of ICAO Annexures,

Indian Aircraft Act and other relevant DGCA rules and regulations.
10.8.3 The inspector should have knowledge of State Safety Program (SSP),
Safety Management System (SMS), and ICAO Safety Audit Program.
10.8.4 The inspector should have successfully completed an audit/ inspection

course from an approved institution.
11. INSPECTION PROCEDURE
The Surveillance activity of CNS facilities begins with the preparation of the yearly
schedule for the inspection and consists of the following sub activities.
11.1 Planning
11.1.1 The schedule provides the information regarding the list / names of the
airports/aeronautical stations for which inspection/safety oversight is to
be carried out.
11.1.2 While selecting a station to be inspected in a particular month the

season prevailing in the region during that period is given
consideration.
11.1.3 The schedule for next year is communicated to the Surveillance

Division of DGCA in the month of November of the previous year.

11.2 Preparation & Execution/conduct of the safety oversight/inspection
11.2.1 CNS Inspector shall familiarize himself/herself with the CNS

facilities available at the station to be inspected.
11.2.2 CNS inspector shall go through all the information available regarding
the station through AIPs, relevant AIP Supplements, CNS Manuals etc.
11.2.3 On the basis of the information available, areas that need to be given
more emphasis during physical inspection are identified, noted and a
questionnaire is prepared to be used during inspection.
11.2.4 The duration of the tour is normally of 2 to 3 days (including journey

period) and is decided depending upon the number of the CNS
facilities available at the airport.
11.2.5 Approval for tour of the nominated CNS inspector is obtained, one
week prior to the proposed date of tour, from the concerned Joint
Director General.
11.2.6 On the basis of the approval, AIC is applied for the Air tickets and tour
order is signed by the Director (ANS).
11.2.7 The tour order is forwarded to Executive Director (CNS) in AAI HQ,
Executive Director of Region concerned and the Airport Director of
the concerned airport for information and necessary arrangements.
11.2.8 On arrival at the airport,CNS Inspector conducts an entry meeting with

the Airport Director along with all the In-charges of CNS, ATM, Fire
Services and C&E Engineering to get an over view of the station and
facility.
11.2.9 Physical inspection of the CNS facilities is conducted & inspection is

carried out as per aforementioned procedures.
11.2.10 The observations made by the inspector during the inspection of the
CNS facilities & procedures are recorded by him/her in DGCA
(INDIA) CNS Inspector‟s Surveillance checklist. A copy of the
checklist is placed at Appendix „A‟ of this handbook.

11.2.11 On the last day of the inspection the inspector lists his/her
observations and discusses it with the unit In-charges.
11.2.12 A final list of mutually agreed observations is then prepared.
11.2.13 An exit meeting is conducted on the last leg of the inspection wherein
Airport Director along with all the Unit In-charges participates. Here
the final observations are conveyed to all concerned.
11.2.14 The Inspector brings this list on return along with him/her for
preparation of the report.
12. REPORT WRITING
12.1 The information collected during inspection and the final list of observations
is prepared and submitted to Director AS & ANSS for discussion and vetting
within 30 days after the completion of inspection. The findings are classified
in two levels:
Level 1 (L1) - any significant non-compliance with the applicable requirement

which lowers the safety standard and hazards seriously the flight safety.
Level 2 (L2) - any non-compliance with the applicable requirement which

could lower the safety standard and possibly hazard the flight safety.
Note- Level 1 finding observed by the inspector during the inspection will be
informed to the service provider after discussing with Director (AS & ANSS)
to act upon it immediately.
12.2 In the next 2 to 3 days the above list of issues is forwarded to the ANSP i.e.
AAI, CHQ and is requested to submit the remedial action mitigation plan and
the Action Taken Report (ATR) for the observations.
13. FOLLOW UP ACTION
13.1 For Level 1 finding: Level 1 finding has to be resolved immediately

(within 7 days) by the service provider and the same should be informed to
the DGCA through suitable means.

For Level 2 finding: The service provider shall establish and submit a
corrective action plan (CAP)/ATR for Level 2 findings within a period of 45
days.
Service provider‟s CAP for level 2 findings should be as follows:
DETERMINED ACTION TIME FRAME FOR ELIMINATION OF

LEVEL DEFICIENCIES IDENTIFIED BY
INSPECTORS
Short-term 60 days from the date of receipt of the inspection
report.
Medium-term 90 days from the date of receipt of the inspection
report.
Long-term 180 days from the date of receipt of the inspection
report.
Note: A single ATR may contain details of action taken i.r.o. L1 and L2
findings.
13.2 The ATR is examined and the issues that are mitigated are removed from the
list of pending issues.
13.3 After submitting initial ATR and CAP, updated status on pending findings is
required to be submitted till compliance is achieved against all the findings
of the inspection.
13.4 Where the service provider could not implement the CAP within the said
period, it may be granted a further period of 15 days by the Director (AS &
ANSS). The past performance of the organization will be considered while
granting the additional time period.
13.5 Where the organization fails to implement the corrective action within the
time frame agreed with DGCA and no reasonable and justified reasons are
assigned, necessary enforcement action will be initiated against the
organization or the person responsible as per the guidelines mentioned in
enforcement policy of DGCA from time to time.
***********

APPENDIX – A
DGCA (INDIA) CNS INSPECTOR’S SURVEILLANCE CHECKLIST

DGCA (INDIA) CNS Inspector Handbook
CNS Inspector’s Surveillance Checklist Appendix A
GOVERNMENT OF INDIA
OFFICE OF THE DIRECTOR GENERAL OF CIVIL AVIATION
OPP-SAFDURJUNG AIRPORT, NEW DELHI
DIRECTORATE OF
AIRSPACE AND AIR NAVIGATION SERVICES STANDARDS
General Information Title: CNS Inspector’s Surveillance Checklist
Airport / Station/Unit Inspected
Period of Surveillance DD/MM/YYYY to DD/MM/YYYY
Airport Director
Name:
Designation:
CNS In charge
Name:
Designation:
Name of the DGCA Inspector/ (s)
Tower ILS AMSS

CNS Installations/ Facilities/ Services
inspected. AHCR VOR
(Tick whichever is applicable)
Equipment Room DME
Automation ASM – GCS
VHF SSR
HF PSR
NDB ADS- B
SIGNATURE OF INSPECTORS WITH DATE Page 1

Area of Inspection
1. DGCA CAR COMPLIANCE FOR CNS INSTALLATIONS

1.1 Does Station have submitted duly completed DGCA CAR Compliance checklist? Yes / No
1.2 If Yes, Is there any observations pertaining to non- compliances? Yes / No

If Yes, Specify the observations:
Area of Inspection Assessment/ Observations

Assessment Code: S= Satisfactory, U= Unsatisfactory, S U N/C N/A Comments
N/C= Not Checked, N/A= Not Applicable
2. MANAGEMENT ORGANIZATION
2.1 Does the CNS provider have a documented organizational

structure?
2.2 Does the organizational structure clearly define lines of
accountability of personnel in respect to the provision of services?
2.3 Does the organizational structure show the relationship between
operational units within the organization?
2.4 Does the organizational structure show names of individuals filling
appropriate management positions?
3. PERSONNEL
3.1 Does the CNS Technical manpower available as per the Define shortage /
sanctioned strength? excess in percentage
3.2 Has the station developed job descriptions for its technical staff?
3.3 Are technical personnel properly equipped, authorized and trained to

perform the duty?
4. TRAINING
4.1 Does the CNS provider have a procedure for maintaining the
competence of its personnel (refresher training, OJT programme)?
4.2 Does the CNS provider have trained personnel dedicated to OJT
activities?
4.3 Is there an established training policy and programs for technical
staff?
4.4 Is the training programme adequate and implemented?
4.5 Does the CNS provider maintain training files/records for its
personnel?


5. WORK ENVIRONMENT
5.1 Is the working environment at the station satisfactory?
5.2 Does the station have enough space for the CNS facilities?
5.3 Are the following factors existing at an acceptable level as per
the judgment of the inspector?
5.3.1 Light
5.3.2 Temperature / Humidity
5.3.3 Dust proof environment

6. COMMUNICATION FACILITIES
6.1 VHF Communication Systems

6.1.1 VHF radio
Serviceability status
Availability (97%)
Standby equipment status
Availability of distress radio 121.5MHz
6.1.2 RCAG
Availability (97%)
Remote status monitors
Standby equipment
6.1.3 HF Radio and SELCALL
Availability (97%)
Standby system


6.1.4 Voice and Data Recording Systems (DVR)
Availability (97%)
Standby system
Recording media capacity and channels Available channels:
Free channels:
Recording of Crash Alarm
ATS playback system
6.2 Other Communication Systems
6.2.1 Telephone
Intercom systems
Direct telephones / Hot lines
6.2.2 DATIS
Availability (97%)
Standby equipment
6.2.3 VCCS
Availability (97%)
Standby system
6.3 Data Communication systems
6.3.1 Automatic Message Switching Systems (AMSS)

Availability (97%)
Remote monitoring
Standby equipment


6.3.2 ATM Message Handling System (AMHS)
Availability (97%)
Remote monitoring
Standby equipment
6.3.4 AIS
Availability (97%)
6.3.5 ASBS (Briefing)
Availability (97%)
Standby System
6.3.6 Internet
Availability
7. NAVIGATION FACILITIES
7.1 Instrument Landing systems (ILS)
7.1.1 Localizer (LLZ)
Type:
Make and Model:
Serial Number:
Availability (97%)
Remote status monitoring
(Telephone Lines/ OFC/RF Link)
Standby equipment
Flight inspection checks
Ground checks
Availability of critical and sensitive areas
Antenna system
- RF cable
- Obstructions such as buildings, trees etc.


7.1.2 Glide Path (GP)
Type:
Make and Model:
Serial Number:
Availability (97%)
Standby equipment
Ground checks
Antenna system
- RF cable
7.1.3 LP Distance Measuring Equipment (DME)
Type:
Make and Model:
Serial Number:
Availability (97%)
Standby equipment
Ground checks
Antenna system
- RF cable


7.1.4 HP Distance Measuring Equipment (DME)
Type:
Make and Model:
Serial Number:
Availability (97%)
Standby equipment
Preventive maintenance
Ground checks
Antenna system
- RF cable
7.1.5 VHF Omni- directional radio Range (VOR)
Type:
Make and Model:
Serial Number:
Availability (97%)
Standby equipment
Ground checks
Antenna system
- RF cable


7.2 Non Directional Beacon (NDB)
Type:
Make and Model:
Serial Number:
Availability (97%)
Standby equipment
Automatic changeover
Antenna system
- RF cable
7.3 Protection of NAVAIDS
Protect NAVAIDS from vandalism/theft:
Is there any arrangement for the safeguard of radio
installations or NAVAIDS (site)?
8. SURVEILLANCE SYSTEMS
8.1 Primary Radar

Type:
Make and Model:
Serial Number:
Availability (97%)
Standby system
Is the physical installation of equipment and antenna
system proper?
Antenna system
- RF cables and control cables


8.2 Secondary Radar Type:
Make and Model:
Serial Number:
Availability (97%)
Standby equipment
Site monitor
Radar display consoles
Is the physical installation of equipment and antenna
system proper?
Antenna system
- RF cable
8.3 ADS-B Type:
Make and Model:
Serial Number:
Availability (97%)
Standby equipment
ADS-B display console
Antenna system
- RF cable
8.4 ASMGCS
8.4.1 MLAT Type:

Make and Model:
Serial Number:
Availability (97%)


Standby equipment
Display console
Antenna system
- RF cable
- Obstruction such as buildings, trees etc
8.4.2 SMR Type:

Make and Model:
Serial Number:
Availability (97%)
Standby equipment
Display console
Antenna system
- RF cable
9. AUTOMATION SYSTEM
Availability (97%)
Standby equipment
Display console
Data communication channel status
Serviceability of LANs
Synchronous Recording
Status of CPME/PARROT/FFM on SDD


10. AUXILIARY FACILITIES
10.1 Test equipment for maintenance

- Availability
- Whether the tools/equipment which require calibration are
periodically calibrated.
10.2 Availability of spares (on site and depot) in sufficient
numbers to meet any immediate requirement
10.3 Is there any policy developed for the retention of spare
parts for the safety critical equipment/ system?
10.4 Maintenance PC/ Laptop
10.5 Earthing systems
10.6 Lightening arrestor
10.7 Smoke Detector and Fire Warning System
10.8 Master and Slave Clock (GPS Clock)
10.9 Emergency equipment
- Fire extinguishers
- First aid kits
10.10 Technical Tool Kit
- Availability of necessary tools/ special tools to carry
out appropriate checks/schedules
11. POWER SUPPLIES
11.1 Provision of mains power Supply including surge

protection
11.2 Provision of standby power
- Battery backup
- Generator
- UPS
12. DOCUMENTATION AND RECORDS
12.1 Site Logbooks: History log book, Shift duty log book,
General duty log book and fault log book.
12.2 Maintenance Schedules
12.3 NAVAIDS flight checks results and

reports
12.4 NAVAIDS ground checks results


12.5 Records of Installations, initial
testing and commissioning
12.6 Test equipment calibration records
12.7 Records of preventive/routine

Checks
12.8 Records of corrective measures
Taken
12.9 Availability of the following updated documents for reference and use:
12.9.1 SOPs for CNS O & M/ Operational and Technical manuals

as supplied by the manufacturer.
12.9.2 Availability of approved maintenance schedules as
prepared and proposed by CNS on the
recommendations of the manufacturer.
12.9.3 Relevant DGCA CARs, Circulars, CNS Manuals, ICAO
documents relevant Annexes and Docs
12.9.4 Technical manuals, drawings, troubleshooting charts
12.10 Does the list of equipment and systems maintained?
12.11 Does the station maintain its own CNS safety
management system (SMS)?
13. PROCESS AND PROCEDURES
13.1 Contingency plan procedure for the smooth operation of

safety critical CNS facilities
13.2 Is there any supervision process established? Who
does the supervision of day to day operation
/maintenance work?
13.3 Is there any reporting procedure available at the time of
breakdown of facility?
13.4 Does the specialist support / made available to the
operational duty team for corrective maintenance
during breakdown of equipment/ system?
13.5 Is there any lay - down procedures of duty handover
and takeover?
13.6 Is there any procedure for logging equipment
abnormality?
13.7 Is there any procedure of coordination with ATS operation
about the logging of equipment abnormality?


13.8 Is there any documented procedure for taking out
operational equipment from the service and returning
back into operation?
13.9 Is there any documented procedure for declaring the
status of equipment in operation?
14. EQUIPMENT ROOM/SHELTER
14.1 Room temperature

14.2 Operation of Air Conditioners
14.3 Fire safety alarm system maintenance records
15. Additional Observations/Comments:

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GOVERNMENT OF INDIA

MINISTRY OF CIVIL AVIATION

DIRECTORATE OF AIR SPACE AND AIR-NAVIGATION

OPP. SAFDARJUNG AIRPORT, AUROBINDOO MARG, NEW

CNS INSPECTOR HANDBOOK i

GLOSSARY OF TERMS AND ABBREVIALTIONS/ACRONYMS v

3. OBJECTIVES OF SAFETY OVERSIGHT INSPECTION 3

4. SCOPE OF SAFETY OVERSIGHT INSPECTION 4

6. THE ROLE OF INSPECTOR(S) 4

10. JOB DESCRIPTION 9

11. INSPECTION PROCEDURES 11

12. REPORT WRITING 13

13. FOLLOW UP ACTION 13

APPENDIX A – CNS CHECKLIST 15

CNS INSPECTOR HANDBOOK ii

This Handbook has been prepared pursuant to powers granted to Director

It is emphasized that all matters pertaining to an inspector‟s duties and

Comments and recommendations for revision/amendment action to this

CNS INSPECTOR HANDBOOK iii

Number Page affected Date Entered Entered by

CNS INSPECTOR HANDBOOK iv

AIP AERONAUTICAL INFORMATION PUBLICATION

AIS AERONAUTICAL INFORMATION SERVICE

ANSP AIR NAVIGATION SERVICE PROVIDER

AS & ANSS AIR SPACE & AIR NAVIGATION SERVICES STANDARDS

ATM AIR TRAFFIC MANAGEMENT

CNS COMMUNICATION, NAVIGATION AND SURVEILLANCE

PANS PROCEDURES FOR AIR NAVIGATION SERVICES

SAR SEARCH AND RESCUE

SMS SAFETY MANAGEMENT SYSTEM

CNS INSPECTOR HANDBOOK v

CNS INSPECTOR HANDBOOK Page 1 of 15

2.4 Rule 156 of the Aircraft Rules, 1937 stipulates

CNS INSPECTOR HANDBOOK Page 2 of 15

(5)The owner or operator of aircraft, organization or air navigation facility

[Substituted by GSR No. 1202 dated 23-7-1976

i) Civil Aviation Requirements and powers delegated vide SO 727 for

3. OBJECTIVES OF SAFETY OVERSIGHT INSPECTION

3.1 The objectives of the safety oversight inspection are as follows:

CNS INSPECTOR HANDBOOK Page 3 of 15

4. SCOPE OF SAFETY OVERSIGHT INSPECTION

a. Personnel, Licensing & Training

ANSS Directorate shall make available a sufficient number of suitable CNS

6. THE ROLE OF INSPECTOR(S)

The tasks to be undertaken by each inspection team member will be assigned by

7.4 The following internationally accepted auditing principles shall be followed:

7.4.1 Transparency and disclosure:

Service Providers shall submit their comments, action plan and

CNS INSPECTOR HANDBOOK Page 5 of 15

7.4.4 In a systematic manner, with consistency and objectivity:

Standardization and uniformity in the scope, depth and quality of

7.5 The Inspectors are required to conduct safety oversight audits/inspections on

7.7 The following four additional auditing/inspections principles shall be

CNS INSPECTOR HANDBOOK Page 6 of 15

Inspection findings, conclusions and reports will be reflected

7.7.2 Due professional care – the application of diligence and judgment

Inspectors shall exercise care in accordance with the importance

Inspectors shall be independent of the activity being audited/

Inspectors are required to maintain an objective state of mind