What was found
ENGINE BEGAN BACKFIRING AND POWER DECREASED, AIRCRAFT LANDED AS A RESULT OF RUNNING THROUGH A FENCE. FOUND NR 1 CYLINDER INTAKE VALVE SPRINGS BROKEN. REPLACED SPRINGS, OPERATION NORMAL. APPEARED TO BE SMALL RUST PITS IN BREAK AREAS.
- Difficulty date
- July 25, 2001
- Submitted
- September 10, 2001
- Operation
- General aviation
- Aircraft
- N2035N
- Make and model
- Wthrly 620B
- Aircraft serial
- 1591
- Engine
- Pwa R985AN1
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Valve Spring
- Part number
- 28160
- Condition
- Broken
- Location
- Nr 1 Cylinder
- Part time
- 6,170 hours, 936 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- R
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.