Summary
We are adopting a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI) Model 369D, 369E, 369F, and 369FF helicopters with certain serial-numbered tailboom assemblies. This AD requires measuring the distance between aft longeron rivets and the outboard edge of frame rings. If the distance is too short to ensure a safe flight, the AD requires installing a doubler. This AD was prompted by the discovery of short-edge margin conditions on two tailboom assemblies. The actions are intended to detect a short-edge margin condition, prevent failure of the tailboom and loss of control of the helicopter.
Directive Details
AD Number
FAA-2012-0890
Document Number
2013-06746
Type
Rule
Publication Date
March 26, 2013
Effective Date
April 30, 2013
Affected Manufacturer
Hughes Helicopters, Inc., and McDonnell Douglas Helicopter Systems (Type Certificate Is Currently Held by MD Helicopters, Inc.)
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2012-0890
Topics
Official Documents
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