Service difficulty report · Floorbeam · Boeing 75724APF

Difficulty date
September 27, 2025
Submitted
October 17, 2025
Operation
Air carrier
Aircraft
N457UP
Make and model
Boeing 75724APF
Aircraft serial
25478
Aircraft time
38,076 hours, 22,607 cycles
Part
Floorbeam
Part number
144N800774
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 CARGO COMPARTMENT FLOORBEAM BS 1100 LBL 0-25 HAS (3EA) AREAS WITH CORROSION. REMOVED CORROSION ON 4 AREAS IAW SRM 51-10-02. ACCOMPLISHED A DVI IAW SRM 51-10-08 AND FOUND NO MORE DAMAGE. AFTER FURTHER EVALUATION FOUND ALL THE AREAS ARE IN LIMITS IAW SRM 53-00-51-1A-1. BEING THE LOWEST POINT 0.212 AND THE MIN ALLOWED IS 0.198. APPLIED SURFACE PROTECTION IAW SRM 51-20-01.

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