# SDR WRLA97006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N273WA](https://openairdocs.org/aircraft/N273WA), registered now
- Make and model: Doug MD-11
- Registry model: [Doug MD-11](https://openairdocs.org/model/mcdonnell-douglas-md-11) (OpenAirDocs)
- Aircraft serial: 48519
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 710129
- Condition: Faulted
- Location: Nr 1 Eng
- Stage of operation: CR
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WRLA97006

## Discrepancy

DURING CRUISE, RECEIVED NR 1 ENG 'FIRE WARNING ALERT'.  CREW RETARDED THROTTLE TO FLIGHT IDLE AND ALERT DISCONTINUED.  CREW ELECTED TO RETURN.  ENGINE WAS CONTINUED TO OPERATE AT FLIGHT IDLE FOR DURATION OF FLT.  A/C LANDED W/O FURTHER INCIDENT.  MX PERSONNEL GROUND RAN ENGINES AT MAX POWER.  ALERT WAS DUP ON GROUND.  FOUND BOTH A AND B PYLON FIRE LOOPS FAULTING.  BOTH FIRE LOOPS WERE REPLACED.  ALL PNEUMATIC DUCTS WERE INSPECTED FOR MALFUNCTIONS.  SEVERAL CLAMPS WERE RE-TORQUED.  PNEUMATIC 'DECAY CHECK' WAS PERFORMED AND SUCCESSFULLY PASSED.  ENGINE WAS AGAIN GROUND RUN WITH NO FAULT INDICATION.  A/C WAS TEST FLOWN.  NO FAULTS NOTED.  A/C WAS RETURNED TO SERV.  (M)

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