Service difficulty report · Fan · Boeing 74745EF

Difficulty date
August 5, 2022
Submitted
August 8, 2022
Operation
Air carrier
Aircraft
N487MC
Make and model
Boeing 74745EF
Aircraft serial
30609
Aircraft time
89,598 hours, 16,597 cycles
Part
Fan
Part number
4100149C
Part serial
1079
Condition
Inoperative
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A, J

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

What was found

EQUIP COOLING EICAS MSG DURING CRUISE. QRH DIRECTED EQUIP COOLING OVRD. OVRD STATUS MSG FOLLOWED BY EQUIP COOLING STATUS MSG(<P>REMOVED AND REPLACED E/E COOLING SUPPLY FAN PER AMM 21-58-01/401 AND EQUIP COOLING INBD EXHAUST VALVE PER AMM 21-58-23/401. REMOVED AND REPLACED EQUIP COOLING VALVE RELAY (R7447) PER WDM 21-58-23. C/W AP-22179 AND E/E COOLING SYS OPS TEST OK PER AMM 21-58-00/501.</P>)

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