Airworthiness directives › 2007-24-09
AD 2007-24-09 Airworthiness Directives; Rolls-Royce plc, RB211 Trent 768-60, 772-60, and 772B-60 Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. These engines are installed on, but not limited to, Airbus A330 series airplanes.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. Initial Inspection (f) Initially inspect the HP/IP turbine oil feed tube outer heat shield for cracks. Use either 3.A.(1) through 3.A.(3) on-wing procedures or 3.B.(1)(a) through 3.B.(1)(e) in-shop procedures of RR Alert Service Bulletin (ASB) No. RB.211-72-AF045, Revision 2, dated July 27, 2006, at one of the following compliance times: (1) At the next shop visit of the 05 Module regardless of the reason for the visit; or (2) Before one of the following intervals whichever occurs latest: (i) 10,000 hours or 2,500 cycles since new, whichever occurs first, or (ii) 2,500 cycles since overhaul of the 05 Module. Repetitive Inspection (g) Re-inspect the HP/IP turbine oil feed tube outer heat shield for cracks as specified in the applicable criteria of paragraphs C.(1)(b)(i) through C(1)(b)(vi) or C(2)(b)(i) through C(2)(b)(ii) of RR ASB No. RB.211-72-AF045, Revision 2, dated July 27, 2006. Use either 3.A.(1) through 3.A.(3) on-wing procedures or 3.B.(1)(a) through 3.B.(1)(e) in-shop procedures of RR ASB RB.211-72-AF045, Revision 2, dated July 27, 2006. Remove HP/IP Turbine Oil Feed Tube Outer Heat Shields From Service (h) Remove from service HP/IP turbine oil feed tube outer heat shields according to the applicable criteria in paragraphs C(1)(b)(vii) through C(1)(b)(vii) or C(2)(b)(iii) of RR ASB No. RB.211-72-AF045, Revision 2, dated July 27, 2006. Terminating Action (i) At the next 05 Module overhaul after the effective date of this AD, or before May 31, 2010, whichever occurs first, as terminating action to the repetitive inspections in this AD, introduce the revised HP/IP turbine bearing support structure. (j) Use one of the following to introduce the revised HP/IP turbine bearing support structure: (1) RR Service Bulletin (SB) No. RB.211-72-F117, Revision 2, dated September 25, 2006; or (2) RR SB No. RB.211-72-F227, Revision 1, dated October 8, 2007; or (3) RR Immediate Operational Request SB No. RB.211-72-F048, Revision 11, dated September 9, 2006. Alternative Methods of
Unsafe condition
This AD results from RR introducing a revised high pressure/low pressure (HP/IP) turbine bearing support structure as terminating action to the repetitive inspections of the HP/IP turbine bearing oil feed tube heat shield. We are issuing this AD to prevent an uncontained failure of the HP turbine disc and damage to the airplane.
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