Service difficulty report · Bearing · Boeing 7377H4

Difficulty date
December 19, 2020
Submitted
December 22, 2020
Operation
Air carrier
Aircraft
N442WN
Make and model
Boeing 7377H4
Aircraft serial
32459
Aircraft time
59,046 hours, 35,009 cycles
Engine
Cfmint CFM567B242
Part
Bearing
Condition
Damaged
Location
Nr1 Engine
Stage of operation
CL
How discovered
9
Nature of condition
J
Precautionary procedure
O

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

What was found

ON CLIMB AT MAX POWER NR 1 ENGINE EGT CLIMBED RAPIDLY, 912 DEGREES C MAX NOTED. REDUCED THRUST, EGT DECREASED. NR 1 ENGINE EDT 708-90 DEGREES C HIGHER THAN NR 2 ENGINE. ALL OTHER INDICATIONS NORMAL. COMPLIED WITH MTSI DIS NR/JO 10813 & MTSI DIS NR/JO 10832, REPORTED FINDINGS TO POWER PLANE ENGINEERING. BLENDED NR 1 ENGINE LOWER FAN FRAME AFT LIP AT 5 O'CLOCK POSITION, DAMAGE MEASURED .750 X .030 DEEP. FINAL BLENDED AREA MEASURES 1.80" LONG X .035" DEEP, PER AMM 72-23-05 NRC D446717. REMOVED & REPLACED NR 1 ENGINE F/B T/R AFT BEARING (HINGE), PER CMM 54-50-02 & AMM 78-31-0.

More about the Boeing 737-7H4