Service difficulty report · Hook · Boeing 737990ER

Difficulty date
January 6, 2023
Submitted
January 9, 2023
Operation
Air carrier
Aircraft
N402AS
Make and model
Boeing 737990ER
Aircraft serial
41189
Aircraft time
37,604 hours, 11,994 cycles
Engine
Cfmint CFM567B27E
Engine time
37,606 hours, 11,995 cycles
Part
Hook
Condition
Worn
Location
#1 Engine
Part time
37,606 hours, 11,995 cycles
Stage of operation
IN
How discovered
B
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

WHILE PERFORMING ASA T/C # SBCFM56-7B-72-0986-1 NOTED THE J-HOOK TO BE WORN THROUGH FOR APPROX 2.5" AND MISSING THE TOP CUP, THEN CRACKED FOR AN ADDITIONAL 2 INCHES @ 2ND STAGE NEAR THE 9 O'CLOCK SPLIT LINE. PER THE T/C STEP. 6 A. NOTE J-HOOK CAN NOT BE WORN THROUGH. ESN # 963291 #1 ENG. GROUNDED - YES. REMOVED #1 ENGINE S/N # 963291, REPLACED WITH S/N # 890730 REF. T/C # 78471000 W/O # 1933619. DEFECT TRANSFERRED TO ASA SHOP W/O # 1937932.