Service difficulty report · Structure · Boeing 75724APF

Difficulty date
April 8, 2026
Submitted
April 21, 2026
Operation
Air carrier
Aircraft
N421UP
Make and model
Boeing 75724APF
Aircraft serial
25281
Aircraft time
35,922 hours, 23,455 cycles
Part
Structure
Condition
Corroded
Location
Zone 200
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

MAIN DECK BALL MAT 232BM1 UNDER SIDE SKIN HAS CORROSION AT ALL BALL CUTOUTS . . INSTALLED SKIN ON BALL MAT 232BM1 IAW SRM 51-40-02 AND SERO-11648 -REQ002. REVIEWED.

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