# SDR ASAA2022031237047

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2021
- Submitted: January 4, 2022
- Operation: Air carrier
- Aircraft: [N587AS](https://openairdocs.org/aircraft/N587AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35684
- Aircraft time: 50,608 hours, 14,715 cycles
- System (JASC): [2697 · Fire Protection System Wiring](https://openairdocs.org/jasc/2697)
- Part: Contact
- Condition: Dirty
- Location: Fire Detector
- 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/ASAA2022031237047

## Discrepancy

DURING FIRE TEST A FAULT OCCURRED ON THE B LOOP. GROUNDED - YES. PERFORMED ENGINE APU FIRE DETECTION CONTROL MODULE BITE TEST ENGINE 2 LOOP B FAN UPPER DETECTOR FAULT. PERFORMED TEST ENGINE 2 LOOP FIRE DETECTOR, CHECK WAS LUGS, CLEANED, CONTACTS AND REINSTALLED FIRE DETECTOR ELEMENT. OPS CHECK GOOD NO MORE FAULTS. NO MORE MAINTENANCE MESSAGE IAW B737-800 FIM 26-10 TASK 805 AND FIM 26-10 TASK 801.

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