Airworthiness Directive · Amendment 39-12499 · Rolls-Royce plc RB211 Turbofan Engines
Rolls-Royce plc RB211 Turbofan Engines
Superseded. A later AD replaced this one: AD 2004-26-03. Comply with the one in force.
Rolls-Royce plc model (RR) RB211-535E4-37 and RB211-535E4-B-37 turbofan engines, with the following high pressure (HP) turbine disks installed: part number (P/N) UL10323, with serial numbers (SN's) CQDY6070 and higher; P/N UL27680, with any serial number; and P/N UL27681, with any serial number. RR model B211-535C- 37 turbofan engines, with the following HP turbine disks installed: P/N LK80622, with SN LQDY6316 and higher; P/N LK80623, with SN CQDY5945 and higher; and P/N UL28267, with any serial number. RR model RB211-535E4-B-75 turbofan engines with the following HP turbine disks installed: P/N UL10323, with SN CQDY6070 and higher; and P/N UL27680, with any serial number. RR model RB211-22B-02 turbofan engines with the following HP turbine disks installed: P/N LK80622, with SN LQDY6316 and higher; P/N LK80623, with SN CQDY5945 and higher; and P/N UL28267, having any serial number. These engines are installed on but not limited to Boeing 757, Tupolev Tu204, and Lockheed L-1011 series airplanes.
This amendment adopts a new airworthiness directive (AD), that is applicable to Rolls-Royce plc model RB211-535E4-37, RB211-535E4-B- 37, RB211-535C-37, RB211-535E4-B-75 and RB211-22B-02 turbofan engines. This amendment requires inspection of certain high pressure (HP) turbine disks, manufactured between 1989 and 1999, for cracks in the rim cooling air holes, and, if necessary, replacement with serviceable parts. This amendment is prompted by reports of cracks in two high life Trent 800 disk rim cooling air holes produced at the same manufacturing facility using the same tooling as the RB211 turbofan engine HP turbine disks. The actions specified by this AD are intended to prevent possible disk failure, which could result in an uncontained engine failure and damage to the aircraft.
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
