Service difficulty report · Floorbeam · Boeing 747422

Difficulty date
November 10, 2015
Submitted
November 18, 2015
Operation
Air carrier
Aircraft
N174UA
Make and model
Boeing 747422
Aircraft serial
24381
Aircraft time
99,993 hours, 10,998 cycles
Engine
Pwa PW4056
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

FLOORBEAM UPPER CHORD CORROSION, AT STATION 900, BL R18 - R24. REPAIR OF FLOORBEAM ACP IAW SRM 53-20-51 FIG 201 REPAIR 1 CAT A.