What was found
PILOT REPORTED ENGINE NOT MAKING POWER. FOUND EXHAUST ROCKER SHAFT HOLDER BROKEN AND NO LONGER ATTACHED TO CYLINDER ASSEMBLY. CAUSING EXHAUST VALVE TO NOT OPEN WHEN REQUIRED.
- Difficulty date
- June 7, 2020
- Submitted
- September 16, 2020
- Operation
- General aviation
- Aircraft
- N423AC
- Make and model
- Piper PA31325
- Engine
- Lyc LTIO540F2BD
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Cylinder Head
- Part number
- LW12966
- Part serial
- 75106
- Condition
- Failed
- Location
- Rocker Shaft
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.