Service difficulty report · Beam · Boeing 74747UF

Difficulty date
January 29, 2012
Submitted
January 30, 2012
Operation
Air carrier
Aircraft
N412MC
Make and model
Boeing 74747UF
Aircraft serial
30559
Aircraft time
52,733 hours, 7,897 cycles
Part
Beam
Condition
Damaged
Location
Cargo Door
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 TROUBLESHOOTING ON THE AFT CARGO DOOR ACCOMPLISHED, MX FOUND DAMAGE TO THE DOOR INTERNAL BEAM (INNER CHORD OF CLOSEOUT BEAM), NEAR THE FWD HOOK PULL IN RETURN SPRINGS AT BS1810 - BS1820 WITH 2 GOUGES, MEASURING 0.187 IN. AND 0.3875 IN. FROM THE EDGE. (GOUGES WERE BLENDED OUT IAW SRM 51-10-02 (REF FIG 1). DOOR PN: 65B04250-17, SN: 001246. DISPOSITION WAS MADE TO PERFORM A TIME LIMITED REPAIR IAW SRM 51-10-02 AS DESCRIBED IN PART 1 WORK INSTRUCTIONS, SCHEDULE REPEAT INSPECTIONS AT EVERY 1,000 FH (FLIGHT HOURS) AND PERMANENT REPAIR PRIOR TO, OR AT THE NEXT C CHECK AFTER PART 1 HAS BEEN ACCOMPLISHED PER PART 3 WORK INSTRUCTIONS.)

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