# SDR ASAA2021040434507

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 4, 2021
- Submitted: April 6, 2021
- Operation: Air carrier
- Aircraft: [N558AS](https://openairdocs.org/aircraft/N558AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35177
- Aircraft time: 53,511 hours, 15,684 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Condition: Faulted
- Location: Nr 1 Engine Fan
- 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/ASAA2021040434507

## Discrepancy

#1 ENGINE B FIRE LOOP WILL NOT TEST. GROUNDED - YES. ACCOMPLISHED BITE CHECK OF FIRE DETECTION CONTROL MODULE REF B737-800 FIM 26-10 TASK 801. FOUND ENG #1 UPPER FAN B LOOP FAULT RESECURED FAN DETECTION HARNESS MW0316 REF B737-800 FIM 26-10 TASK 805. OPS CHECK OK.

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