# SDR CA980818023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 7, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Engine: Lyc TIO540J2BD
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Rocker Arm
- Part number: 17F21186
- Condition: Wrong Part
- Location: Engine
- Component: W12966
- Stage of operation: IN
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA980818023

## Discrepancy

(CAN) WHILE CHANGING AN INTAKE PUSH ROD TO COMPLY WITH LYCOMING 400 HOUR VALVE TRAIN INSPECTION (TAPPET CLEARANCE), THE PUSH ROD WAS FOUND TO HAVE A O.020 INCH DEEP SCORE AROUND THE CIRCUMFERENCE, A HALF INCH FROM THE TOP.  CLOSER INSPECTION FOUND THE SCORING CAUSED BY AN EXHAUST ROCKER INSTALLED IN THE INTAKE POSITION.  THE INTAKE ROCKER PART NUMBER HAD BEEN ETCHED ON IT.

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