Summary
We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 407 helicopters with certain tailboom assemblies installed. 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-stress-concentration 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.
Directive Details
AD Number
FAA-2013-0019
Document Number
2013-14857
Type
Rule
Publication Date
June 27, 2013
Effective Date
August 1, 2013
Affected Manufacturer
Bell Helicopter Textron Canada
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2013-0019
Topics
Official Documents
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