Service difficulty report · Skin · Boeing 75724APF

Difficulty date
May 12, 2025
Submitted
June 6, 2025
Operation
Air carrier
Aircraft
N445UP
Make and model
Boeing 75724APF
Aircraft serial
27390
Aircraft time
31,092 hours, 20,287 cycles
Part
Skin
Part number
311N504658
Condition
Corroded
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

MAJOR REPAIR NR 2 ENGINE PYLON OUTBD INTERNAL SKIN, AFT OF THE MID SPAR FITTING HAS EXFOLIATION CORROSION. DOT 8-001. INSTALLED FITTING AFT HINGE REMOVED ON STEP 4 IAW SRM 51-40-02. AND REQUEST OK TO REINSTALL UPPER SILL ANGLE REMOVED ON STEP 27 FOR FOM. INSTALLED UPPER SILL ANGLE REMOVED ON STEP 27 FOR FOM (FASTENERS USED: SAME ONES REMOVED) IAW SRM 51-40-02.

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