Service difficulty report · Rib · Boeing 747428

Difficulty date
August 18, 2010
Submitted
October 6, 2010
Operation
Air carrier
Aircraft
N580UP
Make and model
Boeing 747428
Aircraft serial
25632
Aircraft time
73,632 hours, 13,252 cycles
Engine
Ge CF680C2B1F
Part
Rib
Part number
65B149022
Condition
Cracked
Location
Rt Wing
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

INSPECTION TYPE:C, RT WING L/E CAVITY RIB AT ILE 756 FOUND CRACK AT MID AREA. RT WING L/E CAVITY RIB AT ILE STA 756.95. REPAIRED IAW HXRS R57-41-36809 REV A AND EO B747-5740-39903-A. THIS REPAIR IS CLASSIFIED AS A MAJOR REPAIR. ORG MAT'L IS FORGING 7075T7352. CRACK LENGTH IS 2.125. FINAL CUTOUT SIZE IS 2.125" X 1". MAT'L 7075-773511 100" PLATE AS REPAIR FTG 7075T6-0.080" AS FILLER. REPAIR SIZE IS 4.375" X 6.625".