Airworthiness directives › 2007-03-13
AD 2007-03-13 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (formerly Rolls-Royce plc) Dart 528, 529, 532, 535, 542, and 552 Series Turboprop Engines
Applicability*9
This AD applies to Rolls-Royce Deutschland Ltd & Co KG (RRD) Dart 528, 529, 532, 535, 542, and 552 series turboprop engines. These engines are installed on, but not limited to, Hawker Siddeley, Argosy AW.650, Fairchild Hiller F-27, F-27A, F-27B, F-27F, F-27G, F-27J, FH-227, FH-227B, FH-227C, FH-227D, FH-227E, Fokker F.27 all makes; British Aircraft Corporation Viscount 744, 745D and 810; and Gulfstream G-159 airplanes.
Compliance
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. (f) Using RRD Dart Service Bulletin (SB) Da72-543, dated July 11, 2003, and the scheme detailed in RRD Repair Instruction, “Restoration of Platform and Shroud gaps by welding, DRS 611,” dated July 15, 2005, inspect and repair HPT blade platforms and shroud abutment faces by weld build-up: (1) After no more than 1,500 flight hours from the date of issue of this AD, if the engine has not been previously inspected or reworked to the DRS 611 standard; (2) Each time new blades are installed; and (3) Before exceeding 7,400 hours since last HPT blade inspection or rework to DRS 611 standard. Alternative Methods of
Unsafe condition
This AD results from reports of high pressure turbine (HPT) disk rim failures. We are issuing this AD to prevent HPT disk rim failures resulting in the release of portions of the HPT disk, uncontained engine failure, and damage to the airplane.
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