Service difficulty report · Smoke Detector · Boeing 747422

Difficulty date
September 25, 2012
Submitted
September 28, 2012
Operation
Air carrier
Aircraft
N174UA
Make and model
Boeing 747422
Aircraft serial
24381
Aircraft time
88,456 hours, 9,873 cycles
Engine
Pwa PW4056
Part
Smoke Detector
Condition
Failed
Location
E&E Bay
Stage of operation
IN
How discovered
O
Nature of condition
J
Precautionary procedure
K

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

What was found

E AND E SMOKE DETECTOR FAIL MSG 21501. REPLACED COOLING SMOKE DETECTOR, OP CHECKED OKAY.