Document ID: chunk:federal_register_of_legislation:F2009L01853:body:0:p2
Version: federal_register_of_legislation:F2009L01853
Segment Type: other
Provision Reference: 
Character Range: 2728–4549

accomplished.

                   3. As of 9 April 2009.

             The compliance times remain unchanged by this issue of the Directive.

             This Directive shall be entered on the Maintenance Release as maintenance required.  The required visual inspection may be performed and certified by a Pilot in Command who has been trained to do the inspection by an appropriately qualified person.  In this case, a copy of the Requirement document and this Directive is to be carried in the aircraft.
             This Amendment becomes effective on 4 June 2009.
Background:  The DGAC received a report of separation of a tail rotor blade trailing edge section due to crack growth in the blade skin.  The unbalance caused by the loss of a blade section can cause tail rotor gearbox separation.

             Amendment 1 introduced certain actions to rotors installed on version N helicopters that are fitted with a 30mm trailing edge tab.

             Amendment 2 introduced requirements to alleviate maintenance for tail rotor blades repaired as per Repair Sheet (FR) CN 376; as specified in the latest revision of the Requirement document.

             Amendment 3 added a new Repair Sheet FR CN 453, and extended the repair accomplishment timescale accordingly; as specified in the Requirement document.

             Amendment 4 introduced a correction to the Requirement 1 compliance; with no change to the technical requirements.

             Amendment 5 is issued in response to a new EASA AD, which adds the Model
             AS 355 NP helicopter to applicability, with no change to the technical requirements.  At the time this directive was issued, there were no AS 355 NP helicopters on the Australian Register.

David Villiers
Delegate of the Civil Aviation Safety Authority

17 April 2009