What was found
EXHAUST VALVE FAILED DUE TO HEAT STRESS, CAUSING LOW COMPRESSION, LOW ENGINE SPEED AND ENGINE VIBRATIONS WHILE AT CRUISE.
- Difficulty date
- October 10, 2025
- Submitted
- October 14, 2025
- Operation
- General aviation
- Aircraft
- N739DB
- Make and model
- Cessna 172N
- Aircraft serial
- 17270451
- Engine
- Lyc O320D2J
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Exhaust Valve
- Condition
- Failed
- Location
- Nr 3 Cylinder
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- R, E
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.