Service difficulty report · Floorbeam · Boeing 747121

Difficulty date
July 25, 2005
Submitted
August 3, 2005
Operation
Air carrier
Aircraft
N683UP
Make and model
Boeing 747121
Aircraft serial
20353
Aircraft time
87,225 hours, 21,374 cycles
Part
Floorbeam
Condition
Corroded
Location
Fuselage
Stage of operation
IN
How discovered
9
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

BS 400 RBL 3 TO 24 FLOORBEAM FOUND CORRODED AS MARKED. CORROSION BLEND OUT 0.043" BY 2" BY 2" EXCEED SRM 53-10-01 FIG 1 LIMITS. BS 400 LBL 7" TO RBL 35" FLOORBEAM REPAIRED AS PER SRM 53-10-07 FIG 10.