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Fri, Jun 28, 2013

AD: Bell Helicopter Textron Canada Helicopters

AD NUMBER: 2013-12-07

PRODUCT: Bell Helicopter Textron Canada (BHTC) Model 407 helicopters with certain tailboom assemblies installed.
SUBJECT: Airworthiness Directive 2013-12-07
ACTION: Final Rule

SUMMARY: This AD requires, at specified intervals, inspecting the tailboom assembly for a crack, loose rivet, or other damage. This AD was prompted by a stress analysis of the tailboom skin that revealed that high-stressconcentration areas are susceptible to skin cracking.

This condition, if not detected, could result in a crack in the tailboom assembly, failure of the tailboom, and subsequent loss of control of the helicopter.

DATES: This AD is effective August 1, 2013.

FMI: AD

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