# SDR ASAA2018011323161

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 2018
- Submitted: January 17, 2018
- Operation: Air carrier
- Aircraft: [N587AS](https://openairdocs.org/aircraft/N587AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35684
- Aircraft time: 39,124 hours, 11,397 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018011323161

## Discrepancy

NUMBER 2 ENGINE FIRE TEST DOES NOT TEST NORMAL WITH BOTH LOOPS SELECTED.  DOES TEST NORMAL WITH ONLY THE A LOOP SELECTED.  ACFT GROUNDED.  PERFORMED AN ENGINE FIRE DETECTION IAW FIM 26-10 TASK 801,  INDICATED THE NR 2 ENG LOOP B FAULTED.  CYCLED THE NR 2 ENGINE FIRE HANDLE AND NR 2 ENGINE FIRE LOOP GROUND.  TESTED GOOD.  CONTROL MODULE BITE SHOWS NO FAULTS. NO HISTORY PREVIOUS 30 DAYS.

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