SDR AALA201904129001

Service difficulty report · Smoke Detector · Boeing 737823

Difficulty date: April 10, 2019
Submitted: April 12, 2019
Operation: Air carrier
Aircraft: N920AN
Make and model: Boeing 737823
Aircraft serial: 29521
Aircraft time: 57,474 hours, 23,333 cycles
System (JASC): 2611 · Smoke Detection
Part: Smoke Detector
Condition: False Activation
Location: Lavatory
Stage of operation: CR
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

AIRCRAFT WAS NOT GROUNDED: ABOUT 3 HOURS INTO FLIGHT, AT CRUISE, AFT LEFT LAVATORY SMOKE DETECTOR LIGHT ILLUMINATED, DISAPPEARED AFTER 10 SECONDS. FLIGHT ATTENDANTS DID THOROUGH CHECK OF LAVATORY AND TRASH. NO INDICATION OF SMOKE, FUMES, OR FIRE. BLOCKED OFF LAVATORY, INDICATION DID NOT REOCCUR. MAINTENANCE ACCOMPLISHED TEST OF LEFT AFT LAVATORY SMOKE DETECTOR AND PERFORMED SATISFACTORY OPERATIONAL CHECK PER AMM 26-10-00.