# SDR ASAA2026042065603

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2026
- Submitted: April 21, 2026
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 70,930 hours, 21,258 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Condition: Malfunctioned
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2026042065603

## Discrepancy

MOMENTARY WHEEL WELL FIRE WARNINGS ON CLIMBOUT. GOT BELL, MASTER FIRE, AND WW FIRE INDICATION. NO MASTER CAUTION. GROUNDED - YES.  AFTER CREW CONSULT WHEEL WELL WARNING WAS ONLY MOMENTARY THEN EXTINGUISHED PERFORMED BITE CHECK OF OVERHEAT DETECTOR CONTROL MODULE NO STORED OR CURRENT FAULTS IAW AMM TASK 26-18-801 PERFORMED OPS CHECK NO DEFECTS NOTED IAW AMM 26-18-00-710-801.

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