Service difficulty report · Firewall · Boeing 75724APF

Difficulty date
March 13, 2025
Submitted
April 10, 2025
Operation
Air carrier
Aircraft
N473UP
Make and model
Boeing 75724APF
Aircraft serial
28846
Aircraft time
25,469 hours, 16,974 cycles
Part
Firewall
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 ENG LP COMPRESSOR INNER CASE AFT BULKHEAD FIREWALL WITH CRACK BTW 8-9 O'CLOCK. INSTALLED ENGINE#1 LH CENTER COMPRESSOR FAIRING OF LP COMPRESSOR INNER CASE. I.A.W AMM 72-03-01-424-006-R00. ACCOMPLISHED STEP 15 OF EO 535-7200-14571. INSTALLATION OF ENGINE #1 LH CENTER COMPRESSOR FAIRING OF LP COMPRESSOR INNER CASE.

More about the Boeing 757-24APF