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
Part number
65B150746
Condition
Corroded
Location
Bs 1445-1448
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 RT LOWER CHORD UPPER SURFACE FOUND CORROSION AT STA 1445-1448 RBL8. CORROSION BLEND OUT 0.091" BY 2" BY 3" EXCEED SRM LIMIT. FX KEEL BEAM RT LOWER CHORD BS 1445-1448 RBL8 LWR FLANGE UPPER SURFACE CORROSION REMOVED AND REPROTECTED AS PER SRM 51-10-01 AND 51-10-02 AN RS R53-49-35827 AND UPS ENGINEERING FILE NR 747-53-20424.

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