Service difficulty report · Structure · Boeing 74747UF

Difficulty date
July 6, 2011
Submitted
July 8, 2011
Operation
Air carrier
Aircraft
N496MC
Make and model
Boeing 74747UF
Aircraft serial
29257
Aircraft time
51,840 hours, 7,944 cycles
Part
Structure
Condition
Damaged
Location
Bs 260
Stage of operation
IN
How discovered
V
Nature of condition
W
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING LOADING OPERATIONS, THROUGH THE NOSE CARGO DOOR, LOADER DROPPED CAUSING DAMAGE TO BS 260, LBL10.75 & RBL 10.75, WL 195.8 - CANTED BULKHEAD STIFFENERS (2 EA.), CONSISTING IN EDGE CRACKS MEASURING 1.5 AND 2.5 INCHES LONG (REF FIG 1). DAMAGE TO THE STIFFENERS EXCEEDS THE SRM 53-10-08-1A-2 ALLOWABLE DAMAGE LIMITS.(DISPOSITION WAS MADE TO PERFORM A TIME LIMITED REPAIR AS DESCRIBED IN PART 1 WORK INSTRUCTIONS, INITIATE REPETITIVE DVIS AT EVERY 5 FC (FLIGHT CYCLES) AND PERMANENT REPAIR PRIOR TO THE ACCUMULATION OF 2,000 (FLIGHT HOURS) AFTER PART 1 IAW THE SRM 51-70-11.)

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