Service difficulty report · Skin · Boeing 75724APF

Difficulty date
July 16, 2026
Submitted
August 18, 2026
Operation
Air carrier
Aircraft
N455UP
Make and model
Boeing 75724APF
Aircraft serial
25476
Aircraft time
46,102 hours, 22,631 cycles
Part
Skin
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

APU COMPARTMENT TAIL CONE LOWER BILGE ALUMINUM HONEYCOMB SKIN PANELS BETWEEN BS 1963 & 1992 HAD AREAS OF CORROSION TO INCLUDE ATTACHMENT TO FRAMES WITH AREAS OF MISSING FINISH. VERIFIED THE ABOVE STEP 17. INSTALLATION OF LWR-BILGE-ALUMN-HONEYCOMB-SKIN-PANEL BTWN BS.1963 & 1992 AT APU-COMPART-TAIL-CONE IAW SRM 51-40-02-0G-0, & THE APPLICATION OF FILLET-SEAL ON LOWER BILGE, ALUMN-HONEYCOMB-SKIN PANEL BTWN BS 1963 & 1992 IAW AMM 51-31-01-392-039.

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