Document ID: chunk:federal_register_of_legislation:F2007L04224:body:0:p2
Version: federal_register_of_legislation:F2007L04224
Segment Type: other
Provision Reference: 
Character Range: 2842–5057

2. Before further flight after the effective date of this AD, unless previously accomplished.

                3. No later than 31 December 2011.
             This Amendment becomes effective on 22 November 2007.
Background:  An event has occurred on a Tay 620-15/20 powered aircraft where all the Low Pressure (LP) compressor case ice impact panels of Rolls-Royce Service Bulletin TAY-72-1326 standard on both engines were released in flight.  The released LP compressor case ice impact panels were caught in front of the fan outlet guide vanes, resulting in bypass duct blockage and significant thrust loss.  The actions specified by this Airworthiness Directive are intended to make sure that the bonding of these LP compressor ice impact panels complies with the design intent.

             Amendment 6 reflects that RRD has revised NMSB TAY-72-A1650 Revision 1 to introduce new production LP compressor cases for the Tay 611-8 engines to allow replacement of the complete LP compressor case instead of the ice impact panels only.  This amendment adds a reference to the latest RRD Service Bulletin (SB) revision.

             Amendment 5 included the TAY 611-8C engine.

             Amendment 4 included a new replacement panel which has a new retention system and layer structure which is designed to prevent failure of the panel.

             Amendment 3 updated the reference document to the last revision and changed the compliance period for some models of engine for replacement of the ice impact panels.

             Amendment 2 updated the reference documents to reflect the latest revision.

             Amendment 1 of this Directive superseded those requirements detailed in AD/TAY/10 Amdt 1 and AD/TAY/11.

             Amendment 5 of this Directive became effective on 19 January 2006.

             Amendment 4 of this Directive became effective on 27 October 2005.

             Amendment 3 of this Directive became effective on 12 May 2005.

             Amendment 2 of this Directive became effective on 23 December 2004.

   Amendment 1 of this Directive became effective on 28 October 2004.

David Punshon
Delegate of the Civil Aviation Safety Authority

2 October 2007