Service difficulty report · Deflector · Boeing 7379

Difficulty date
October 4, 2022
Submitted
October 10, 2022
Operation
Air carrier
Aircraft
N918AK
Make and model
Boeing 7379
Aircraft serial
44083
Aircraft time
5,071 hours, 1,592 cycles
Engine
Cfmint LEAP1B28
Part
Deflector
Condition
Cracked
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

REF ASA T/C 72-220-00 #1 ENG BOROSCOPE COMBUSTION CHAMBER SUBTASK 72-00-00-211-007-G00 (2)(B)(1). FOUND 7 DEFLECTOR PLATES WITH AXIAL CRACKS. MEASURED #1 CRACK MEASURED AT 1", #2 CRACK MEASURED AT 0.587". THE REST OF THE CRACKS ARE MEASURED AT MORE THAN 0.20" IN LENGTH BY COMPARISON. ONE DEFLECTOR HAS 2 CRACKS. GROUNDED - YES. CRACKS LONGER THAN THE SERVICEABLE LIMIT ARE PERMITTED FOR 25 CYCLES REF ASA TASK CARD# 72-220-00. INSPECTION REQUIREMENTS WILL BE TRACKED VIA EA PWRPL-72EA-24829.

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