Airworthiness Directive · Amendment 39-17391 · Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 611-8 turbofan engines, serial numbers 16245, 16256, 16417, 16418, 16584, 16585, 16639, 16640, 16701, 16702, 16813, 16814, 16853, 16854, 16879, 16880, 16898, 16905, 16906, 16911, 16923, 16935, and 16936, with a date of the last shop visit before December 8, 2006.
We are adopting a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) Tay 611-8 turbofan engines. This AD requires inspection and replacement, if necessary, of affected bolts. This AD was prompted by a quality review determination that bolts with reduced material properties may have been installed in some engines. We are issuing this AD to prevent uncontained turbine disc fracture and damage to the airplane.
Unless already done, for engines with a date of the last shop visit before December 8, 2006, do the following actions:
(1) If engine cycles accumulated since the last engine shop visit is 5,400 cycles or more on the effective date of this AD, inspect the bolts installed in the low-pressure turbine (LPT) stage 1 static seal and high-pressure turbine (HPT) stage 1 air seal support within 100 engine cycles-in-service after the effective date of this AD.
(2) If engine cycles accumulated since the last engine shop visit is fewer than 5,400 cycles on the effective date of this AD, inspect the bolts installed in the LPT stage 1 static seal and HPT stage 1 air seal support before accumulating 5,500 engine cycles since the last engine shop visit.
(3) If you find any broken bolt, brown bolt, or bolt with a rough oxidized surface, then replace all bolts of the inspected engine flange with new bolts before further flight.
After the effective date of this AD, do not install any HPT module and/or LPT module into any engine, or any engine onto an airplane, unless the bolts have been inspected and replaced if necessary, as specified in paragraph (e) 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.
Engines
