Service difficulty report · Strut · Boeing 7377H4

Difficulty date
October 25, 2026
Submitted
October 30, 2026
Operation
Air carrier
Aircraft
N495WN
Make and model
Boeing 7377H4
Aircraft serial
33869
Aircraft time
88,910 hours, 53,204 cycles
Engine
Cfmint CFM567B242
Part
Strut
Condition
Cracked
Location
Zone 400
Stage of operation
IN
How discovered
V
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

NR 1 ENGINE LPT TURBINE REAR FRAME FOUND TO HAVE THREE MOUNT STRUTS CRACKED. NR 1 STRUT AT C2, NR 15 STRUT AT C2, & NR 16 STRUT AT C1 & C2 THROUGH CRACK. ACCOMPLISHED M-21-172-00811 (TRIGGERING TRF MOUNT INSPECTION 7256-I-11716-D FOR LARGEST CUMULATED CRACK FINDINGS FROM 0.39 INCH TO LESS THAN 0.59 INCH IN LENGTH FOR AREAS A & B AND 0.51" TO LESS THAN 0.79" FOR AREA C)

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