Service difficulty report · Skin · Boeing 74748EF

Difficulty date
July 25, 2011
Submitted
July 29, 2011
Operation
Air carrier
Aircraft
N419MC
Make and model
Boeing 74748EF
Aircraft serial
28367
Aircraft time
67,951 hours, 11,520 cycles
Part
Skin
Condition
Cracked
Location
Bs 983 S38r
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

CRACK DAMAGE IN LOWER SKIN ASSY AT BS 983, S38R IN THE DRAG SPLICE FITTING AREA. THE CRACK DAMAGE WAS DETECTED DURING C02 PLUS A3 CHECK AND WHILE COMPLYING WITH SB 747-53A2444, REV 2. NRC 50352 WAS USED TO DOCUMENT THE FINDING OF THE CRACK DAMAGE. (THE ACTIONS REQUIRED TO CLOSE RC 50352 AND TO COMPLY WITH SB 747-53A2444 REV 2, WERE TO CUT THE CRACK DAMAGE AREA OUT OF THE SKIN, INSTALL A REPLACEMENT SECTION OF SKIN IN THE CUTOUT AREA OF THE SKIN, AND TO INSTALL 2 EXTERNAL REPAIR DOUBLERS IAW SRM 53-20-01, FIG 201, REPAIR 2, DETAIL IV AND RS NR: R-53-20-37177.

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