Service difficulty report · Strap · Boeing 75724APF

Difficulty date
October 2, 2025
Submitted
October 23, 2025
Operation
Air carrier
Aircraft
N459UP
Make and model
Boeing 75724APF
Aircraft serial
25480
Aircraft time
35,817 hours, 21,917 cycles
Part
Strap
Part number
148N313820
Condition
Corroded
Location
Zone 100
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

TAILCONE. APU INLET DOOR CUTOUT HAS CORROSION ON THE FWD EDGE.REMOVED FWD STRAP LOWER MIDDLE ANGLE AND FWD LOWER ANGLE AT APU INLET DOOR STRUCTURE IAW SRM 51-40-02-0G-0. SEVERE CORROSION ON REMOVED PARTS FWD STRAP PN, UPPER MIDDLE ANGLE, UPPER FWD ANGLE LOWER MIDDLE ANGLE PN: 148N3152-1 AND LOWER FWD ANGLE PN: 148N3141-5 WAS FOUND AND NO ALLOWABLE DAMAGE WAS FOUND IN THE SRM THEREFORE IS NECESSARY FABRICATE OR REPLACE. IAW SRM 51-10-02-0G-0 PAR 9.INSTALLED 1EA UPPER MIDDLE SUPPORT ANGLE P/N 148N3152-2SAAU, 1EA FWD UPPER ANGLE PN: 148N3141-6SAAU, 1EA FWD LOWER ANGLE PN: P/N 148N3141-5SAAU, 1EA LOWER MIDDLE ANGLE AND 1 EA NEW FWD STRAP AT APU INLET DOOR STRUCTURE IAW B757-200PF SRM 51-40-02-0G-0, PAR 4 AND PAR 7.

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