Service difficulty report · Floorbeam · Boeing 75724APF

Difficulty date
September 6, 2026
Submitted
September 11, 2026
Operation
Air carrier
Aircraft
N463UP
Make and model
Boeing 75724APF
Aircraft serial
28267
Aircraft time
40,335 hours, 21,491 cycles
Part
Floorbeam
Part number
146N51631
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 STA 1500 BTW LBL 45.50 TO 54.9 FLOORBEAM HAS CORROSION AROUND SCREW HOLE. VERIFIED STEP 9 REF GMM RII 04-02. EVALUATED REWORKED AREA ON MAIN DECK STA 1500 BTW LBL 45.50 TO 54.9 FLOORBEAM UPPER FLANGE, DIMENSIONS L:1.700" W:1.300" X:0.011", ORIG. MAT. THK .220", MAX. MATERIAL LOSS ALLOWED IS 10% GAGE MAXIMUM, FOUND TO BE WITHIN LIMITS IAW SRM 53-00-51-1A-1 FIG.101 AND SRM 53-60-51-0I-1 FIG. 1.

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