# SDR CALA2026013013441

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2026
- Submitted: January 30, 2026
- Operation: Air carrier
- Aircraft: [N17105](https://openairdocs.org/aircraft/N17105), registered now
- Make and model: Boeing 757224
- Aircraft serial: 27295
- Aircraft time: 113,836 hours, 26,661 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: 4755712
- Condition: Faulted
- Location: Zone 900
- Stage of operation: DE
- 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/CALA2026013013441

## Discrepancy

ON DESCENT GOT A LAV SMOKE EICAS AND HORN FROM MID LAV. NO VISIB LE SMOKE OR ODOR PRESENT WHILE REMOVING SMOKE DETECTOR IN MID LAV FOUND ONE SCREW STRIPPED. REQUEST SHEET METAL ASSISTANCE.  REMOVED STRIPPED SCREW PER SRM 51-40-02. REMOVED AND REPLACED LAV S SMOKE DETECTOR IAW AMM 26-15-01. PERFORMED SELF AND SMOKE TEST. OPS CHECK GOOD AT THIS TIME. OK TO CONTINUE.

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