# SDR UALA2013060503899

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 3, 2013
- Submitted: July 12, 2013
- Operation: Air carrier
- Aircraft: N177UA
- Make and model: Boeing 747422
- Aircraft serial: 24384
- Aircraft time: 94,056 hours, 11,378 cycles
- Engine: Pwa PW4056
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 8244
- Condition: Faulty
- Location: Nr 4 Nacelle
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013060503899

## Discrepancy

NR 4 ENGINE FIRE LOOP B MESSAGE.  REPLACED UPPER AFT LOOP B, TS681 IAW AMM AND TESTS OK IAW MM.

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