SDR UIEA200200039

Service difficulty report · Keelbeam · Boeing 747230B

Difficulty date: September 19, 2002
Submitted: October 11, 2002
Operation: Air carrier
Aircraft: N512MC
Make and model: Boeing 747230B
Aircraft serial: 21220
System (JASC): 5314 · Fuselage Main, Keel
Part: Keelbeam
Condition: Corroded
Location: Fuselage
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

DURING CURRENT C-CHECK AT SIAEC, FOUND KEEL BEAM BOX, LOWER CHORD, INNER VERTICAL SURFACE CORRODED LEVEL 1, AT BS 1267 RBL 10. CORROSION REMOVED BY BLENDING. HFEC INSPECTED AREA FOR ADDITIONAL CORROSION. NO CORROSION FOUND. ORIGINAL THICKNESS BEFORE BLENDING WAS .300, AFTER BLENDING .220 REMAINING. (M)