SDR UPS03440338

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

KEEL BEAM BOX EXTERIOR LOWER I/B SURFACE FOUND SURFACE CORROSION AT STA 1383 TO STA 1405 LBL 7. CORROSION REMOVED AND REPROTECTED AS PER SRM 51-10-01 AND SRM 51-10-02, BLEND OUT DEPTH 0.008 INCH, WIDTH 1 INCH, LENGTH 3 INCHES WITHIN SRM 53-10-01 LIMITS. (DEPTH 0.040 INCH, WIDTH 1 INCH, LENGTH 2 INCHES).

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