# SDR ZJWA102306001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2006
- Submitted: October 16, 2006
- Operation: Air carrier
- Aircraft: [N446AE](https://openairdocs.org/aircraft/N446AE), registered now
- Make and model: Gulstm 500B
- Aircraft serial: 1613211
- Engine: Lyc IO540E1A5
- Engine time: 11,679 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Condition: Loose
- Location: Lt Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: C
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ZJWA102306001

## Discrepancy

LEFT ENGINE WAS LOSING RPM.  WHEN RPM GOT BELOW 2000 THE PILOT FEATHERED THE ENGINE AND LANDED SAFELY.  AT ENGINE TEAR DOWN THE NR 5 CYLINDER EXHAUST SEAT HAD COME LOOSE IN THE HEAD AND CAUSE ALUMINUM SHAVINGS TO GET IN THE OIL SYSTEM AND BLOCK THE PROP GOVERNOR.  PROBABLE CAUSE WAS A SUDDEN COOL DOWN OF THE ENGINE AT SOME POINT.

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