Service difficulty report · Frame · Boeing 7472D7B

Difficulty date
August 3, 2011
Submitted
August 6, 2011
Operation
Air carrier
Aircraft
N524MC
Make and model
Boeing 7472D7B
Aircraft serial
21784
Aircraft time
105,635 hours, 21,872 cycles
Part
Frame
Condition
Chafed
Location
Bs 1980
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 VISUALLY FOUND CHAFING DAMAGE ON FRAME PN 65B04600-7 AT STA 1980 AND COMMON TO STRINGERS 22R AND 23 R. THIS WAS DOCUMENTED ON NRC 51305. (THE DAMAGE WAS REPAIRED BY BLENDING OUT THE CHAFE MARKS. THE BLENDED AREAS WERE HFEC INSPECTED TO ENSURE CRACK FREE CONDITION. REPAIR REINFORCEMENT ANGLE AND FILLERS WERE MADE FROM 7075-T6 MATERIAL. THE PARTS AND REPAIR AREA WERE TREATED AND PRIMED IAW SRM AND FAY SEALANT USED BETWEEN ALL PARTS.)

More about the Boeing 747-2D7B