# SDR ASAA2023081744673

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2023
- Submitted: August 21, 2023
- Operation: Air carrier
- Aircraft: [N581AS](https://openairdocs.org/aircraft/N581AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35188
- Aircraft time: 56,871 hours, 16,962 cycles
- System (JASC): [2610 · Detection System](https://openairdocs.org/jasc/2610)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: TX
- How discovered: C
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023081744673

## Discrepancy

#1 ENGINE "B" LOOP FIRE TEST FAULT GROUNDED - YES. ACCOMPLISHED ENGINE/APU FIRE DETECTION CONTROL MODULE BITE REF B737-800 FIM 26-10 TASK 801. FAULT SHOWS DETECTOR WIRING OPEN. FOUND BROKEN TERMINAL LUG ON THE UPPER FAN DETECTOR ASSY. RETERMINATED REF B737 SWPM 20-30-11. RETURNED THE MODE SELECTOR SWITCH TO NORMAL POSITION. OP CK GOOD REF B737-800 AMM M26-15-01-400-801. GROUND VERIFICATION SUCCESSFUL.

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