Service difficulty report · Fan · Boeing 747422

Difficulty date
July 27, 2001
Submitted
August 28, 2001
Operation
Air carrier
Aircraft
N180UA
Make and model
Boeing 747422
Aircraft serial
25224
Aircraft time
46,937 hours, 5,740 cycles
Engine
Pwa PW4056
Part
Fan
Part number
732591F
Part serial
16
Condition
Defective
Location
Cabin
Part time
46,937 hours, 5,740 cycles
Stage of operation
NR
How discovered
O
Nature of condition
B
Precautionary procedure
H

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

What was found

SMELL OF ELECTRICAL SMOKE, STRONGEST NEAR AFT GALLEY LOWER DECK. UTILITY BUSSES DROPPED OFF, SWITCHES WERE TURNED OFF, SYSTEM WENT TO SMOKE CLEARING MODE, SMELL WENT AWAY, UTILITY BUSSES LEFT OFF. THE RIGHT OVERHEAD RECIRCULATION FAN WAS FOUND DEFECTIVE. THE FAN WAS REPLACED AND NO FURTHER PROBLEMS WERE REPORTED.