# SDR 95ZZZM543

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 1995
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N93104
- Make and model: Boeing 747131
- Aircraft serial: 19670
- System (JASC): [8012 · Engine Start Valves/Controls](https://openairdocs.org/jasc/8012)
- Part: Start Valve
- Part number: 7265747
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZM543

## Discrepancy

STL - DURING CRUISE SHUT DOWN NR 1 ENGINE, S/N 4165, DUE TO START VALVE LIGHT ILLUMINATED.  FOUND START VALVE PRESSURE SWITCH, MFG P/N 21SN41-1B, WITH INTERNAL MALFUNCTION.  REPLACED START VALVE PRESSURE SWITCH AND START VALVE, MFG P/N 726574-7.  ENGINE OPERATION AND LEAK CHECK NORMAL.

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