What was found
(CAN) ALUMINUM PARTICLES WERE FOUND IN THE OIL FILTER. UPON TEARDOWN OF THE ENGINE, A BROKEN INTAKE VALVE SPRING (OUTER) HAS DAMAGED THE ALUMINUM CYLINDER HEAD. (TC NR 20070827013)
- Difficulty date
- August 27, 2007
- Submitted
- October 24, 2007
- Operation
- General aviation
- Make and model
- Cessna 172M
- Aircraft time
- 3,296 hours
- Engine
- Lyc O360A4M
- Propeller
- Mcauly 1A200DFA
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Valve Spring
- Part number
- AEL11800
- Condition
- Broken
- Location
- Intake
- Part time
- 313 hours
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.