# SDR 2006FA0000451

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2006
- Submitted: May 6, 2006
- Operation: General aviation
- Engine: Lyc O360J2A
- Engine time: 260 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Condition: Malfunctioned
- Component: Engine, Lyc, 0360J2A
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: R
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2006FA0000451

## Discrepancy

NEW ENGINE IN NEW HELICOPTER. AFTER FLYING 1.5 HOURS, ENGINE WILL START POPPING AND BACKFIRING, CAUSING AN AUTOROTATION.  MFG SAID IT'S A NORMAL MAINTENANCE ITEM TO REMOVE VALES AND REAM VALVE GUIDES.

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