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SDR CALA2026102120481

Open the Markdown

Service difficulty report · Smoke Detector · Boeing 757224

FAA SDR system

Difficulty date
October 19, 2026
Submitted
October 21, 2026
Operation
Air carrier
Aircraft
N33103
Make and model
Boeing 757224
Aircraft serial
27293
Aircraft time
121,049 hours, 25,979 cycles
System (JASC)
2611 · Smoke Detection
Part
Smoke Detector
Condition
False Activation
Location
Zone 900
Stage of operation
DE
How discovered
O
Nature of condition
N
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LAV SMOKE CAUTION MSG DURING DESCENT, PASSING 16000. NO SMOKE OBSERVED. AFT LT LAV. DEBRIEF CREW & THEY STATED DIDN'T SMELL OR SAW SMOKE IN CABIN OR LAV. AMBER CAUTION EICAS MSG & SMOKE DETECTOR CHIME CAME ON INFLIGHT & ON GROUND. VISUALLY INSPECTED SMOKE DETECTORS & NO OBVIOUS FAULTS NOTED. NO EICAS MSG ILLUM AT MOMENT. DURING REMOVAL OF SMOKE DETECTOR IN AFT LEFT LAV. FOUND MULTIPLE WIRES CHAFED EXPOSING COPPER. FOUND SMOKE DETECTOR TO NOT BE MAKING ALARM SOUND. REMOVED AND REPLACED SMOKE DETECTOR IN AFT LEFT LAV IAW AMM 26-14-01. OPS CHKD GOOD. NO FURTHER DEFECTS NOTED. ON INSPECTION OF WIRES, NOTED NO DAMAGED OR EXPOSED CONDUCTOR. ACCOMPLISHED INSULATION REPAIR IAW WDM 26-14-11-1, & SWPM 20-10-13.