# SDR 97ZZZX3436

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 20, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Engine: Cont IO520F
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Push Rod
- Part number: 538304
- Condition: Broken
- Location: Nr 5 Cyl Int
- Part time: 1,366 hours
- Stage of operation: IN
- Nature of condition: E, R
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX3436

## Discrepancy

AFTER NORMAL FLIGHT AND ON TURN-AROUND, ENGINE ON POWER CHECK RAN VERY ROUGH AND WOULD NOT RESPOND NORMALLY TO THROTTLE ADVANCE.  FOUND NR 5 CYLINDER WITH ONE BROKEN (INTAKE) PUSH ROD AND EXHAUST PUSH ROD BENT.  ENGINE SHOP ADVISED VALVE STEMS STUCK.  15W50 AEROSHELL WAS IN USE AT THIS TIME.

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