Service difficulty report · Cooling Fan · Boeing 777222

Difficulty date
November 10, 2002
Submitted
December 18, 2002
Operation
Air carrier
Aircraft
N785UA
Make and model
Boeing 777222
Aircraft serial
26954
Aircraft time
24,897 hours, 3,938 cycles
Engine
Pwa PW4090
Part
Cooling Fan
Part number
4100941A
Part serial
0398
Condition
Failed
Location
Fwd Cargo Bay
Part time
25,103 hours, 3,965 cycles
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

EQUIPMENT COOLING EICAS MESSAGE "EQP CLNG OVRID". EQUIPMENT COOLING MESSAGES HIT ON PREVIOUS FLIGHTS. PROBLEM WAS FIXED BY REPLACING THE RT EQUIPMENT COOLING SUPPLY FAN. SHOP REPORTS THAT THE FAN FAILED DUE TO DEFECTIVE BEARINGS.