Airworthiness Directive · Amendment 39-18254 · Rolls-Royce plc Turbofan Engines
Rolls-Royce plc Turbofan Engines
Superseded. A later AD replaced this one: AD 2024-10-06. Comply with the one in force.
This AD applies to all Rolls-Royce plc (RR), RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4-C-37 turbofan engines.
We are adopting a new airworthiness directive (AD) for all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4- C-37 turbofan engines. This AD requires reducing the cyclic life limits for certain high-pressure turbine (HPT) disks, removing those disks that have exceeded the new life limit, and replacing them with serviceable parts. This AD was prompted by RR updating the life limits for certain HPT disks. We are issuing this AD to prevent failure of the HPT disk, which could result in uncontained disk release, damage to the engine, and damage to the airplane.
(1) After the effective date of this AD, use Task 05-00-01-800-000, “Recording and Control of the Lives of Parts”, dated July 1, 2015, of the Rolls-Royce (RR) RB211-535E4-37/23 Time Limits Manual (TLM), publication reference T-211(535)-6RR, Revision 49, dated July 1, 2015 to determine the new life limits for the affected engine models and configurations, with the exception of those engine models mentioned in paragraph (e)(2) of this AD.
(2) For RR RB211-535E4-B-37 or RB211-535E4-C-37 engines with an affected HPT disk that was previously installed on an RB211-535E4-37 engine operated under Flight Plan A, use Task 05-10-01-800-000, “Group A Parts Lives—CONFIG-1”, dated July 1, 2014, of the RR RB211-535E4-37/23 TLM, publication reference T-211(535)-6RR, Revision 49, dated July 1, 2015 to re-calculate equivalent cycles since new to obtain the new life limit.
(3) If an affected engine model has an HPT disk installed with part number (P/N) UL27681 or UL39767, remove the affected HPT disk before the accumulated cyclic life exceeds either 19,500 flight cycles (FCs) under Flight Plan A, or 14,700 FCs under Flight Plan B, or within 25 FCs after the effective date of this AD, whichever occurs later.
(4) For all affected engines, other than those specified in paragraph (e)(3) of this AD, remove each HPT disk before exceeding its applicable life limit as specified in Task 05-00-01-800-000, “Recording and Control of the Lives of Parts”, dated July 1, 2015, of the RR RB211-535E4-37/23 TLM, publication reference T-211(535)-6RR, Revision 49, dated July 1, 2015; and Task 05-10-01-800-000, “Group A Parts Lives—CONFIG-1”, dated July 1, 2014, of the RR RB211-535E4-37/23 TLM, publication reference T-211(535)-6RR, Revision 49, dated July 1, 2015.
(5) Install an HPT disk eligible for installation.
For the purpose of this AD, a part eligible for installation is one with a P/N listed in Task 05-00-01-800-000, “Recording and Control of the Lives of Parts”, dated July 1, 2015, of the RR RB211-535E4-37/23 TLM, publication reference T-211(535)-6RR, Revision 49, dated July 1, 2015; and Task 05-10-01-800-000, “Group A Parts Lives—CONFIG-1”, dated July 1, 2014, of the RR RB211-535E4-37/23 TLM, publication reference T-211(535)-6RR, Revision 49, dated July 1, 2015 with a total accumulated cyclic life that is less than the applicable life limit specified in those Tasks.
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.
Engines
