Service difficulty report · Floorbeam · Boeing 75724APF

Difficulty date
March 5, 2026
Submitted
March 31, 2026
Operation
Air carrier
Aircraft
N451UP
Make and model
Boeing 75724APF
Aircraft serial
27739
Aircraft time
41,230 hours, 23,656 cycles
Part
Floorbeam
Part number
146N51581
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

MAJOR REPAIR, MAIN DECK CARGO COMP. FLOOR BEAM LWR CHORD HAS CORROSION, APPROX AT BS 1400, BTW RBL 24.75 AND RBL 45.50, ID STICKER NUM. (085-074). ATA 53-10. REMOVED CORROSION AT MAIN CARGO COMP. FLOOR BEAM LWR CHORD APPROX. AT BS 1400, BTW RBL 24.75 AND RBL45.50 REF. B757-200PF SRM 53-00-51-1A-1 FIG 101 NOTE 'B' DETAIL III. INSTALLED ALL REPAIR PARTS WITH BMS 5-95 SEALANT IAW EA 757-5360-01-B0695 REV P1 STEP 18. ACCOMPLISHED THE CATEGORY A REPAIR PER EO-96956-REQ1 AND VT-SAA EA 757-5360-01-B0695 REV IR

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