SDR 2022F00129

Service difficulty report · Shaft · Boeing 74747UF

Difficulty date
September 16, 2021
Submitted
March 11, 2022
Operation
General aviation
Aircraft
N499MC
Make and model
Boeing 74747UF
Aircraft serial
29260
Engine
Ge CF680C2B1F
Engine time
70,802 hours, 15,377 cycles
Part
Shaft
Part number
1277M75G07
Part serial
GWNY0828
Condition
Cracked
Location
Fan Rotor
Part time
70,802 hours, 15,377 cycles
Component
Fan Rotor · Ge
Component part number
FANROTOR
Stage of operation
IN
How discovered
D
Nature of condition
O
Precautionary procedure
K

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

What was found

CF6-80C2B1F, FAN FWD SHAFT WITH 6 EA FPI INDICATIONS ON AREA FB NEAR THE VENT HOLES. 1 EA INDICATION CONFIRMED AS A CRACK. PER THE GEK92451 TASK 72-21-05-230-001-051 A.(2) INDICATIONS IN AREA FA AND FB ARE NOT PERMITTED. PART IS UNSALVAGEABLE.

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