Service difficulty report · Floorbeam · Boeing 757251

Difficulty date
December 13, 2025
Submitted
December 15, 2025
Operation
Air carrier
Aircraft
N555NW
Make and model
Boeing 757251
Aircraft serial
33391
Aircraft time
63,261 hours, 28,684 cycles
Part
Floorbeam
Condition
Corroded
Location
Zone
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

CORROSION ON MAIN DECK FLOORBEAM TOP FLANGE ON BOTH UPPER AND LOWER SURFACES AT BS 1681 LBL 12. REMOVED CORROSION AT BS 1681 LBL 12 FLOORBEAM TOP FLANGE, FOUND TO BE OUT OF LIMITS. REMOVED DAMAGE AND REPAIRED FLOORBEAM IAW SRM 53-00-51-1A-1 AND SRM 53-60-51-2R-3 REPAIR 3. (1350058)