# SDR UIEA2011022800133

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2011
- Submitted: March 1, 2011
- Operation: Air carrier
- Aircraft: [N492MC](https://openairdocs.org/aircraft/N492MC), registered now
- Make and model: Boeing 747-47UF
- Registry model: [Boeing 747-47UF](https://openairdocs.org/model/boeing-747-47uf) (OpenAirDocs)
- Aircraft serial: 29253
- Aircraft time: 53,827 hours, 9,769 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Part number: 7303079299910
- Part serial: 200004059
- Condition: Stuck
- Location: Nr 4 Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: E, F
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2011022800133

## Discrepancy

FIRE INDICATION, WARNING AND FIRE BELL DURING CLIMB. PERFORMED "FIRE ENGINE 4" CHECKLIST PER QRH. FIRE EXTINGUISHED IMMEDIATELY AFTER DISCHARGE OF ONE BOTTLE(FOUND NR 4 PRSOV STUCK OPEN. REPLACED PRSOV AND PERFORMED PNEUMATIC HEALTH CHECK. ALL PNEUMATIC CHECKS SATISFACTORY.)

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