SDR UIEA200400169

Service difficulty report · Spar · Boeing 747230B

Difficulty date: September 22, 2004
Submitted: October 1, 2004
Operation: Air carrier
Aircraft: N512MC
Make and model: Boeing 747230B
Aircraft serial: 21220
System (JASC): 5711 · Wing Spar
Part: Spar
Condition: Corroded
Location: Rt Wing
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

FOUND DURING SCHEDULED MAINTENANCE, CORROSION ON FRONT SPAR WEB, FSS 979.27, LOWER CHORD, LEFT SIDE. BLENDED OUT CORROSION WITH 125 RT FINISH. HFEC INSPECTED OPEN FASTENER HOLES, TO ENSURE DEFECT FREE CONDITION. FLAP PEEN BLENDED SURFACES. FABRICATED AND INSTALLED A 0.071 INCH THICK 7075-T6 DOUBLERS AND A FITTED FILLER. REPLACED THE RIB POST AT WS 972. (M)