Service difficulty report · Keelbeam · Boeing 747212B

Difficulty date
July 3, 2007
Submitted
July 27, 2007
Operation
Air carrier
Aircraft
N522UP
Make and model
Boeing 747212B
Aircraft serial
21936
Aircraft time
74,820 hours, 17,560 cycles
Part
Keelbeam
Condition
Corroded
Location
Bs 1460
Stage of operation
IN
How discovered
9
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 FX KEEL BEAM BOX LOWER EXTERNAL PANEL SUPPORT ATT SHIM FOUND CORROSION AT STA 1460 LBL4 TO LBL5 AND RBL4 TO RBL5 UPPER SURFACE TO STIFFENER AREA AS MARKED. CORROSION BLEND OUT 0.065" BY 3/4" BY 1 1/4" EXCEED SRM LIMIT. FX KEEL BEAM BOX LOWER EXTERNAL PANEL SUPPORT ATT SHIM REPLACED AND INSTALLED AS PER SRM 51-10-01 PG 9 AND 51-30-02.

More about the Boeing 747 212B