SDR UPS03440339

Service difficulty report · Keelbeam · Boeing 747200

Difficulty date: March 6, 2003
Submitted: March 24, 2003
Operation: Air carrier
Aircraft: N520UP
Make and model: Boeing 747200
Aircraft serial: 21943
Aircraft time: 73,562 hours, 16,470 cycles
System (JASC): 5314 · Fuselage Main, Keel
Part: Keelbeam
Condition: Corroded
Location: Fuselage
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:N/A FX - KEEL BEAM BOX EXTERIOR I/B SURFACE FOUND SURFACE CORROSION AT STA 1416 TO STA 1456 LBL 7. (DEPTH 0.055 INCH, WIDTH .75 INCH, LENGTH .75 INCH). CORROSION REMOVED AND REPROTECTED AS PER SRM AND SRM 51-10-02 BLEND OUT DEPTH 0.009 INCH, WIDTH 1 INCH, LENGTH 3 INCHES WITHIN SRM 53-10-01 LIMITS.

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