What was found
FOUND 5 EXHAUST VALVE STEMS WORN ONE-FOURTH THE DIAMETER OF THE VALVE STEM. THESE WERE FOUND ON AN ENGINE TEAR DOWN FOR PROPELLER STRIKE. THESE VALVES WOULD EVENTUALLY HAVE CAUSED ENGINE FAILURE.
- Difficulty date
- March 6, 1995
- Submitted
- March 26, 2000
- Operation
- General aviation
- Engine
- Cont IO520BB
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Valve Stem
- Part number
- 646286
- Condition
- Worn
- Location
- Cylinder
- Part time
- 333 hours
- Stage of operation
- IN
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.