Airworthiness directives › 2012-25-08
AD 2012-25-08 Airworthiness Directives; Rolls-Royce plc Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce plc (RR) RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines with serial numbers (S/Ns) listed in Table 1 to paragraph (c) of this AD. Table 1 to Paragraph (c)—Affected Engine S/Ns 41221 41435 41446 41459 41465 41425 41437 41451 41460 41466 41428 41438 41452 41461 41468 41430 41440 41454 41462 41469 41431 41442 41455 41463 41470 41432 41445 41456 41464 41471
Compliance
(1) Initially inspect the HP/IP turbine bearing support oil feed tube within the compliance times specified in paragraphs 1.D.(1)(a) through 1.D.(1)(a)(ii) of RR Alert Service Bulletin (ASB) No. RB.211-72-AG873, dated February 27, 2012. Perform the initial inspection in accordance with paragraphs 3.A (1)(a) through 3.A (1)(j) of RR ASB No. RB.211-72-AG873, dated February 27, 2012. (2) If the HP/IP turbine bearing support oil feed tube outer heat shield is not present, accept the module as compliant. No further action is required.
Required actions
If the HP/IP turbine bearing support oil feed tube outer heat shield is present, perform repetitive inspections of the HP/IP turbine bearing support oil feed tube, in accordance with paragraphs 3.A (2)(b) through 3.A (2)(f) of RR ASB No. RB.211-72-AG873, dated February 27, 2012.
Unsafe condition
Unless already done, do the following actions.
Affected ADs
None.
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