Airworthiness Directive · Amendment 39-16724 · Rolls-Royce plc (RR) RB211-524 Series Turbofan Engines
Rolls-Royce plc (RR) RB211-524 Series Turbofan Engines
Superseded. A later AD replaced this one: AD 2013-04-01. Comply with the one in force.
This AD applies to RB211-524D4-19, -524D4-B-19, -524D4-39, -524D4-B-39, -524D4X-19, -524D4X-B-19, -524H-36, -524H2-19, -524H-T-36, -524H2-T-19, -524G2-19, -524G3-19, -524G2-T-19, and -524G3-T-19 engines with thrust reverser units (TRUs) that have a part number (P/N) specified in paragraph 1.A. of RR Alert Service Bulletin (ASB) RB.211-78-AG084, Revision 5, dated February 4, 2011, installed. These engines are installed on, but not limited to, Boeing 747 series and 767 series airplanes.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Unless already done, do the following actions:
(1) If the TRU has previously had engine manual repair No. FRS5887 and either engine manual repair No. FRS4976 or engine manual repair No. FRS6669 as a result of a translating cowl gearbox stubshaft failure, then perform the actions specified in Section 3. Accomplishment Instructions of RR ASB RB.211-78-AG084, Revision 5, dated February 4, 2011, within 215 cycles-in-service (CIS) after the effective date of this AD.
(2) If the TRU has previously only had engine manual repair No. FRS5887 as a result of a translating cowl gearbox stubshaft failure, then perform the actions specified in Section 3. Accomplishment Instructions of RR ASB RB.211-78-AG084, Revision 5, dated February 4, 2011, within 2,225 CIS after the effective date of this AD.
Actions specified in paragraph (f)(1) and (f)(2) of this AD that are performed using RR ASB RB.211-78-AG084, Revision 4, dated December 22, 2009, RR ASB RB.211-78-AG084, Revision 3, dated November 6, 2009, comply with paragraph (f)(1) and (f)(2) of this AD.
This AD differs from the Mandatory Continuing Airworthiness Information (MCAI) and/or service information as follows:
(1) For engines on which the TRU was previously repaired using either engine manual repair No. FRS4976 or engine manual repair No. FRS6669 and engine manual repair FRS5887 as a result of a translating cowl gearbox stubshaft failure, the MCAI requires compliance before March 31, 2010. This AD requires compliance within 215 cycles-in-service (CIS) after the effective date of this AD.
(2) For engines on which the TRU was previously repaired using engine manual repair No. FRS5887 only, the MCAI requires compliance before December 31, 2012. This AD requires compliance within 2,225 CIS after the effective date of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
