Airworthiness directives › 2018-18-15
AD 2018-18-15 Airworthiness Directives; Rolls-Royce plc Turbofan Engines
Applicability*9
This AD applies to certain Rolls-Royce plc (RR) RB211-Trent 875-17, 877-17, 884-17, 884B-17, 892-17, 892B-17 and 895-17 turbofan engines with an engine serial number listed in Section 1.A., Effectivity, of RR Alert Non-Modification Service Bulletin (NMSB) RB.211-72-AJ463, Revision 2, dated June 28, 2017.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For engines installed on-wing, after the effective date of this AD, replace each affected LPC case A-frame hollow locating pin, part number (P/N) FK11612, within the compliance times specified in RR Alert NMSB RB.211-72-AJ463, Planning Information, Section 1.D.(1), or within 30 days after the effective date of this AD, whichever occurs later, with a part eligible for installation. (2) After the effective date of this AD, unless already accomplished by paragraph (g)(1) of this AD, at the next engine shop visit, replace each affected LPC case A-frame hollow locating pin, P/N FK11612, with a part eligible for installation. (3) Use Section 3, Accomplishment Instructions, of RR Alert NMSB RB.211-72-AJ463, Revision 2, dated June 28, 2017, to perform the replacements required by paragraphs (g)(1) and (2) of this AD.
Unsafe condition
This AD was prompted by low-pressure compressor (LPC) case A-frame hollow locating pins that may have reduced integrity due to incorrect heat treatment. We are issuing this AD to prevent failure of the locating pins, engine separation, and loss of the airplane.
Affected ADs
None.
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