# SDR P5CA0601429

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2005
- Submitted: January 26, 2006
- Operation: Air carrier
- Aircraft: [N509MC](https://openairdocs.org/aircraft/N509MC), registered now
- Make and model: Boeing 747230B
- Aircraft serial: 21221
- Aircraft time: 115,219 hours, 21,935 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Relief Valve
- Part number: 3206247
- Part serial: 637
- Condition: Failed
- Location: Nr 1 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P5CA0601429

## Discrepancy

CREW REPORTED NR 1 ENGINE NACELLE TEMP WENT TO TOP END OF SCALE.  RETARDED THROTTLES, TEMP DECREASED.  RETURNED TO RMS.  FOUND NR 1 ENGINE PRESSURE RELIEF VALVE FAILED.  REPLACED PER AMM 36-11-03.  OPS OK.

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