AD 91-10-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming Engines | TIO-540-AE2A | TEXTRON LYCOMING Model TIO-540-AE2A Engines |
Unsafe Condition
Failure of exhaust transition flange bolts can result in engine power loss, engine fire, and possible loss of aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove and replace exhaust transition flange bolts within 10 hours in service after the effective date. Install specified hardware (LW-31SS-1.19 bolts, 77611 gaskets, STD-2043 nuts), torque to 17 ft.-lbs., and ensure bolts do not loosen during installation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 10 hours in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Textron Lycoming Model TIO-540-AE2A engines with serial numbers up to but not including L9161-61A, except L9157-61A, installed in Piper Malibu Mirage aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.