# SDR UALA2012062203392

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 22, 2012
- Submitted: August 14, 2012
- Operation: Air carrier
- Aircraft: N199UA
- Make and model: Boeing 747422
- Aircraft serial: 28717
- Aircraft time: 60,197 hours, 7,065 cycles
- Engine: Pwa PW4056
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: S332T10017
- Condition: Faulty
- Location: Engine
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012062203392

## Discrepancy

REF DF836, MEASURED 1.2K OHMS TO GND AT PIN 3 OF CONNECTOR D4154P REF WDM 26-11-44, ISOLATED TO UPPER AFT DETECTOR.  REPLACED UPPER AFT FIRE LOOP DETECTOR PER AMM.  ENGINE FIRE SYSTEM OPS TEST OK.

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