# SDR CALA2026031614594

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 16, 2026
- Submitted: March 16, 2026
- Operation: Air carrier
- Aircraft: [N656UA](https://openairdocs.org/aircraft/N656UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25394
- Aircraft time: 127,982 hours, 19,662 cycles
- System (JASC): [2620 · Extinguishing System](https://openairdocs.org/jasc/2620)
- Part: Extinguisher
- Part number: 301000223
- Condition: Damaged
- Location: Zone 900
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026031614594

## Discrepancy

FWD LAVATORY FIRE ALARM ACTIVATED IN FLT, NO FIRE, FUMES, OR SMOKE.  CIRCUIT BREAKER PULLED.  AFFECTED LAV IS 1A-1L (FWD LEFT). SMOKE DETECTOR TEST OK. FIRE EXTINGUSHER HAS MELTED TIPS AND REQUIRES REPLACEMENT IAW FIM 26-13, FAULT TREE 806.   LAVATORY SMOKE DETECTION AND FIRE PROTECTION PROBLEMS. GREEN POWER LIGHT ON LAV FIRE DETECTOR OK. SELF TEST SWITCH ON THE SMOKE DETECTOR OK. RED ALARM LIGHT ON THE SMOKE DETECTOR DOES COME ON AND THE SMOKE DETECTOR ALARM IS HORN HEARD. ATTENDANT CALL LIGHT IN THE PASSENGER COMPARTMENT FLASHES & PAX CABIN CALL CHIME HEARD INTERMITTENTLY. OPS CHK OF THE LAV DETECTOR & ASSOCIATED WARNINGS OK. NO FAULTS FOUND ON LAV FIRE DETECTION SYS.  IAW FIM 26-13 806.  R & R THE LAV 1A-1L FIRE EXTINGUISHER BOTTLE. REPLACED TRASH TEMP INDICATOR. IAW AMM 26-24-01.  NO FURTHER EVIDENCE OF FIRE OR SMOKE DETECTED IN LAV OR VICINITY. ALL OPS CHKS OF DETECTOR OK. RETURNED CB'S AND FLIGHT DECK TO NORMAL IAW FIM 26-13 806.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.