# SDR 2000UALA00039

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2000
- Submitted: October 4, 2000
- Operation: Air carrier
- Aircraft: N986UA
- Make and model: Boeing 737291
- Aircraft serial: 21748
- Aircraft time: 57,249 hours, 43,775 cycles
- Engine: Pwa JT8D17
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 1061096316
- Condition: Shorted
- Location: Apu
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2000UALA00039

## Discrepancy

THE AIRCRAFT DIVERTED DUE TO AN AMBER ALERT ON THE AUXILIARY POWER UNIT FIRE INDICATION.  *S/D*  THE LOWER LOOP M334 SHORTED TO GROUND.  REPLACED THE LOWER LOOP M334 AND AUXILIARY POWER UNIT FIRE BOTTLE.

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