# SDR AU001056

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 24, 2000
- Submitted: December 7, 2000
- Operation: General aviation
- Make and model: Wthrly 620B
- Engine: Pwa R985AN14B
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Piston
- Part number: 40698
- Condition: Wrong Part
- Location: Engine
- Component: Engine, Pwa
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU001056

## Discrepancy

(AUS) INCORRECT PISTONS FITTED TO NR 4 AND NR 7 CYLINDERS. THE PISTONS WERE UNDRILLED AND ARE ONLY USED IN NR 5 AND NR 6 CYLINDERS. THE ENGINE HAD BEEN OVERHAULED IN THEUSA.  UNAPPROVED PART.  (X)

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