# SDR ASAA2017010619256

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2017
- Submitted: January 12, 2017
- Operation: Air carrier
- Aircraft: [N518AS](https://openairdocs.org/aircraft/N518AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35693
- Aircraft time: 30,626 hours, 9,055 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Fire Loop
- Condition: Malfunctioned
- Location: Nr 2 Nacelle
- 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/ASAA2017010619256

## Discrepancy

WITH LOOP SELECTORS IN, NR 2 ENGINE DOES NOT TEST ON FIRE SYSTEM CHECK.  ACFT GROUNDED.   UNABLE TO DUPLICATE DEFECT. IAW AMM 26-11-00, ACCOMPLISHED ENGINE FIRE DETECTION LOOP RESISTANCE SYSTEM TEST, ALL VALUES ARE WITHIN LIMITS. REINSTALLED ENGINE, AND APU FIRE DETECTION MODULE IAW AMM 26-10-01, OPS CHECKED NORMAL.

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