Service difficulty report · Smoke Detector · Boeing 777223
FAA SDR system
- Difficulty date
- September 13, 2020
- Submitted
- September 23, 2020
- Operation
- Air carrier
- Make and model
- Boeing 777223
- Aircraft serial
- 29579
- Aircraft time
- 85,246 hours, 10,930 cycles
- Part
- Smoke Detector
- Part number
- PU90471WR1
- 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 NOT GROUNDED. L4 LAVATORY SMOKE DETECTOR EICAS INDICATION, APPEARED NUMEROUS TIMES IN FLIGHT, LAVATORY NOT OCCUPIED. MEL 09-135DC-C REF 2603 LAVATORY SMOKE DETECTOR *LAV UNUSEABLE* AUTHORIZED. NO PRIOR HISTORY, TROUBLESHOOTING. SUPPLEMENTAL REPORT: REMOVED AND REPLACED L4 LAVATORY SMOKE DETECTOR, PER AMM 26-13-01, NO HARD FAULT FOUND. FUNCTIONAL CHECK GOOD. CLEARED MEL. (CLOSED)