LYCOMING SI1009BD TBO Schedule
LYCOMING SI1009BD TBO Schedule
LYCOMING SI1009BD TBO Schedule
All engine models are to be overhauled within twelve (12) calendar years of the date they first entered
service or of last overhaul. This calendar year time period TBO is to mitigate engine deterioration that
occurs with age, including corrosion of metallic components and degradation of non-metallic components
such as gaskets, seals, flexible hoses and fuel pump diaphragms.
For FAA Part 91 or EASA Part NCO (non-commercial) operations, only an appropriated rated and
qualified maintenance person (or international equivalent) can allow the twelve (12) calendar year TBO to
be exceeded after thoroughly examining the engine for corrosion and degradation in accordance with 14
CFR 43 Appendix D (or international equivalent) and determining that the engine remains in an airworthy
condition. This inspection is to be repeated annually or as necessary to ensure continued airworthiness. The
twelve (12) calendar year TBO must not be exceeded if the engine is affected by AD 2012-19-01 and not in
compliance with AD 2012-19-01.
NOTICE: The TBOs for engines used in crop dusting or other chemical application is a maximum of
1500 hour, or the time referenced in Tables 1 and 2, whichever is lower.
Tables 1 and 2 have references to the NOTES at the end of this Service Instruction with specific
information regarding the engine overhaul intervals