Service difficulty report · Floorbeam · Boeing 747121

Difficulty date
March 12, 2006
Submitted
March 31, 2006
Operation
Air carrier
Aircraft
N681UP
Make and model
Boeing 747121
Aircraft serial
19661
Aircraft time
106,939 hours, 27,146 cycles
Part
Floorbeam
Condition
Corroded
Location
Fuselage
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

BS 1580 RBL 78-96 FLOORBEAM FOUND CORRODED. CORROSION BLEND OUT 0.093" BY 3/4" BY 1.5" EXCEED SRM 53-10-01 FIG 1 LIMITS. BS 1580 RBL 78 TO RT MOST O/B FLOOR BEAM REPAIRED AS PER SRM 51-40-04 FIG 3.