Service difficulty report · Floorbeam · Boeing 747451

Difficulty date
February 11, 2012
Submitted
February 16, 2012
Operation
Air carrier
Aircraft
N105UA
Make and model
Boeing 747451
Aircraft serial
26473
Aircraft time
72,413 hours, 8,591 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

UPPER DECK FLOORBEAM STA 1020 LBL 6 UPPER T-CHORD CORRODED. MAJOR REPAIR ACCOMPLISHED. REMOVED CORRODED SECTION OF T-CAP. SPLICED IN NEW SECTION PER SRM 53-10-07, FAA FORM 8100 -9, & ECRA 5310-05444. EVERY 3,000 CYCLES PERFORM DETAILED VISUAL INSP OF REPAIR AREA. AT EVERY 6,000 CYCLES PERFORM HFEC INSP OF REPAIR AREA. INITIAL RE-INSPECTIONS TO BEGIN AT PTC 20,000. CURRENT PTC IS 8591.^13FEB OPB INF- :MF8649 CREATED TO RE-CHECK EVERY 3000 CYCLES.