Service difficulty report · Smoke Warning · Boeing 7474H6

Difficulty date
July 25, 2011
Submitted
July 27, 2011
Operation
Air carrier
Aircraft
N743WA
Make and model
Boeing 7474H6
Aircraft serial
26562
Aircraft time
66,286 hours, 8,498 cycles
Engine
Pwa PW4056
Part
Smoke Warning
Condition
False Activation
Location
Cargo Bay
Stage of operation
AP
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

EICAS ALERT "FIRE CARGO FWD" ALERT ON FINAL APPROACH TO RUNWAY 34R. TOWER/ATC NOTIFIED- EMERGENCY EQUIPMENT DISPATCHED TO AIRCRAFT. SUSPECT FALSE INDICATION- DUE CONDENSATION. VISUALLY CHECKED HEATERS AND CONTROLLERS END, AND 2 FWD CARGO COMPARTMENT. ZONE 3 AND 4 AFT CARGO COMPONENTS. CHECKED THE SMOKE DETECTION A/B CIRCUIT BREAKER (28VDC). PERFORMED OPERATIONAL TEST PER TASK 26-16-00-715-001- TEST PASS/NIL EICAS FAULTS, MSG. AS PRECAUTIONARY PERFORMED GROUND TEST CMC TEST PASS PER SUBTASK 26-16-00-865-069. OPS CHECK OK. OK TO CONTINUE.

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