SDR P5CA0100582

Service difficulty report · Keelbeam · Boeing 747249F

Difficulty date: June 25, 2001
Submitted: July 17, 2001
Operation: Air carrier
Aircraft: N920FT
Make and model: Boeing 747249F
Aircraft serial: 22237
System (JASC): 5314 · Fuselage Main, Keel
Part: Keelbeam
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

LEVEL 1 CORROSION - KEEL BEAM LOWER PANEL SUPPORT BEAM CORRODED AT STA 1391 LBL 15 TO RBL 15. BLENDED OUT CORROSION AS PER 53-10-01. CLEANED OUT DEPTH W/IN LIMIT OF 20% THICKNESS. RE-PROTECTED W/ ALODINE & PRIMER AS PER SRM 51-10-02. DIMENSIONS ARE MATERIAL THICKNESS 0.097", MAX ALLOWED DEPTH 0.019", CORROSION REMOVED 0.014".