Service difficulty report · Support · Boeing 7472D7B

Difficulty date
September 22, 2011
Submitted
September 22, 2011
Operation
Air carrier
Aircraft
N524MC
Make and model
Boeing 7472D7B
Aircraft serial
21784
Aircraft time
105,974 hours, 21,942 cycles
Part
Support
Condition
Cracked
Location
Bs 1920
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 MX, DAMAGE FOUND AT MAIN DECK - LT BS 1920 - SIDEWALL/LINER SUPPORT CONSISTING OF CRACK. LOCATED AFT OF THE MDSCD, MEASURING 1.5 IN. LONG (REF FIG 1). DISPOSITION WAS MADE TO PERFORM A TIME LIMITED REPAIR AS DESCRIBED IN PART 1 WORK INSTRUCTIONS. CONSISTING IN FABRICATING/INSTALLING A REPAIR DOUBLER MADE FROM CLAD 2024 T-3, 0.050 IN. WITH 2 ROWS OF FASTENERS AROUND THE DAMAGE; SCHEDULE REPEAT INSPECTIONS AT EVERY 5 FC (FLIGHT CYCLES) IAW PART 2 AND PERMANENT REPAIR PER PART 3 PRIOR PRIOR TO THE ACCUMULATION OF 750 FH (FLIGHT HOURS), AS SCHEDULED BY MX PLANNING.

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