Service difficulty report · Skin · Boeing 7472D7B

Difficulty date
September 15, 2011
Submitted
September 19, 2011
Operation
Air carrier
Aircraft
N522MC
Make and model
Boeing 7472D7B
Aircraft serial
21783
Aircraft time
109,510 hours, 21,928 cycles
Part
Skin
Condition
Damaged
Location
Vertical Stab
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 VOR ANTENNA REPLACEMENT, DISCOVERED THE VERTICAL STABILIZER - FIN WL339.5 SUSTAINED LIGHTNING STRIKE CAUSING DAMAGE TO THE VOR ANTENNA AND TO THE RT SIDE OF THE VERTICAL STABILIZER EXTERNAL SKIN CONSISTING OF A HOLE/PUNCTURE MEASURING 1.3 INCHES DIAM. (REF FIGURE 1). THE DAMAGE IS BEYOND THE LIMITS OF SRM 51-40-06, FIGURE 1 (DISPOSITION WAS MADE TO PERFORM A TIME LIMITED REPAIR AS DESCRIBED IN PART 1 WORK INSTRUCTIONS; SCHEDULE REPEAT INSPECTIONS AT EVERY 10 FC (FLIGHT CYCLES) AND PERMANENT REPAIR PRIOR TO THE ACCUMULATION OF 2,000 FH (FLIGHT HOURS) AFTER PART 1, IAW SRM 51-40-00.)

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