Document ID: chunk:federal_register_of_legislation:F2005L02808:body:0:p3
Version: federal_register_of_legislation:F2005L02808
Segment Type: other
Provision Reference: 
Character Range: 5734–7510

part of this Directive, may be performed and certified by the Pilot in Command who has been trained to do the Requirement Part A.1. action and Requirement Part B. inspection by an appropriately qualified person.  In this case, a copy of the applicable ASB or ABT and this Directive is to be carried in the aircraft.

             The compliance times for Parts A, B, C, and D remain unchanged from the previous issue of this Directive.
             This Amendment becomes effective on 27 October 2005.
Background:  Transport Canada received reports of three occurrences of skin cracks originating near the tail rotor blade trailing edge balance weight.  Two of the occurrences resulted in loss of the weight and a strip of material along the trailing edge, leading to an imbalance, which caused fracture of three of the four tail rotor gearbox attachments.  One of these occurrences resulted in the gearbox shifting that caused failure of the drive shaft, which resulted in loss of yaw control.

             Amendment 1 introduced Agusta-Bell AB206A/B helicopters to the requirements of this Directive.

             Amendment 2 introduced terminating action requiring affected blades to be inspected for acceptable tail rotor blade skin thickness.

             Amendment 3 is issued in response to a revision of the related Transport Canada AD, which introduces more stringent tail rotor skin damage limits, and re-balance requirements.

             Amendment 2 of this Directive became effective on 30 September 2004.

             Amendment 1 of this Directive became effective on 6 May 2004.

             The original issue of this Directive became effective on 26 March 2004.

David Villiers
Delegate of the Civil Aviation Safety Authority

16 September 2005