Service difficulty report · Smoke Detector · Boeing 747422

Difficulty date
December 22, 2007
Submitted
December 26, 2007
Operation
Air carrier
Aircraft
N104UA
Make and model
Boeing 747422
Aircraft serial
26902
Aircraft time
41,441 hours, 5,019 cycles
Engine
Pwa PW4056
Part
Smoke Detector
Part number
2156656
Condition
False Activation
Location
Fwd Cargo Bay
Stage of operation
IN
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

STATUS MESSAGE CARGO FWD-2 LOOP-A MESSAGE. STATUS MESSAGE CARGO FWD-2 LOOP-A MESSAGE. NO ACTIVE MESSAGE ON AIRCRAFT ARRIVAL. NO PRESENT LEG FAULTS. NUMEROUS FIRE TESTS CARRIED OUT BOTH FROM OVERHEAD SWITCH AND CMC GROUND TEST. ALL TESTS PASS. DEFERRAL CLEARED.