SDR IPXA2025100722583

Service difficulty report · Strap · Boeing 75724APF

Difficulty date: September 24, 2025
Submitted: October 8, 2025
Operation: Air carrier
Aircraft: N425UP
Make and model: Boeing 75724APF
Aircraft serial: 25370
Aircraft time: 35,094 hours, 23,206 cycles
System (JASC): 5247 · Auxiliary Power Unit (APU) Doors
Part: Strap
Part number: 14831388000
Condition: Corroded
Location: Apu Door
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

APU DOOR SUPPORT STRUCTURE AFT STRAP SHOWS SIGNS OF CORROSION. REMOVED OUTER STRAP, REPAIR DOUBLER (-1), FILLER (-3), STRAP (-2) AND FILLER (-4) FROM APU DOOR SUPPORT STRUCTURE IAW SRM 51-40-02-0G-0. INSTALLED -1 DOUBLER, -2 STRAP, -3 FILLER AND -4 FILLER AND OUTER STRAP AND FILET SEALING AT APU DOOR SUPPORT STRUCTURE AFT IAW SRM 53-80-15-2R-1 REPAIR 1.

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