What was found
DURING A SCHEDULED INSPECTION, FOUND THAT THE NR 4 ENGINE CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THAT THE EXHAUST VALVE FACE AND EXHAUST SEAT INTERFACE SHOWED EXCESSIVE WEAR CAUSING THE EXHAUST VALVE FACE TO CUP.
- Difficulty date
- March 16, 2018
- Submitted
- April 3, 2018
- Operation
- General aviation
- Aircraft
- N903FC
- Make and model
- Piper PA28161
- Aircraft serial
- 2842175
- Aircraft time
- 5,782 hours
- Engine
- Lyc O320D3G
- Engine time
- 9,980 hours
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Exhaust Valve
- Part number
- 17B23936
- Condition
- Worn
- Location
- Nr 4 Cylinder
- Part time
- 1,187 hours
- Component
- Cylinder · Lyc
- Component part number
- LW12416
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.