Replacement AD on Hydromechanical metering unit for Turbomeca Arriel 2B1 Engines

April 14th, 2014

The FAA is superseding airworthiness directive (AD) 2007-19-09R1 for all Turbomeca S.A. Arriel 2B1 turboshaft engines that do not have modification TU157 incorporated. AD 2007-19-09R1 required replacement of the hydromechanical metering unit (HMU) with a serviceable HMU. This AD requires HMU replacement; reduction of the compliance interval; and inclusion of the power turbine C2 cycle consumption rate when determining compliance times. This AD was prompted by reports of ruptures on HMU constant delta pressure valves that have less than 2,000 hours in service. They are issuing this AD to prevent failure of the HMU, which could lead to damage to the engine, and damage to the aircraft. The New AD is 2014-07-06 DATES: This AD is effective May 15, 2014. pdf icon 2014-07-06.pdf


AD High Pressure (HP) compressor stages 1 to 6 rotor disc assemblies for Rolls-Royce Engines

April 7th, 2014

The superseding airworthiness directive (AD) 2012-26-14 for all Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 turbofan engines. AD 2012-26-14 required removal from service of certain high-pressure (HP) compressor stages 1 to 6 rotor disc assemblies before exceeding certain thresholds. This AD requires removal from service at those same thresholds but restricts the applicability to engines exposed to silver-plated nuts, and removes the terminating action statement required by AD 2012-26-14. This AD was prompted by RRD development of a new silver-free nut that, if installed with a new HP compressor stages 1 to 6 rotor disc assembly, would correct the unsafe condition identified in AD 2012-26-14. They are issuing this AD to prevent failure of the HP compressor stages 1 to 6 rotor disc assembly, which could lead to an uncontained engine failure and damage to the airplane. The new AD is 2014-07-02 DATES: This AD is effective May 8, 2014. pdf icon 2014-07-02.pdf


AD for Low-pressure (LP) compressor module on Rolls-Royce Engines

April 7th, 2014

The FAA is superseding airworthiness directive (AD) 2007-03-02 for all Rolls-Royce Deutschland (RRD) Tay 620-15, Tay 650-15, and Tay 651-54 turbofan engines. AD 2007-03-02 required an ultrasonic inspection (UI) of low-pressure (LP) compressor fan blades for cracks on certain serial number (S/N) Tay 650-15 engines. AD 2007-03-02 also required, for all Tay 611-8, 620-15, Tay 650-15, and Tay 651-54 engines, initial and repetitive UIs of LP compressor fan blades. AD 2007-03-02 also required, for Tay 650-15 and Tay 651-54 engines, UIs of LP compressor fan blades whenever the blade set is removed from one engine and installed on a different engine. This AD requires additional inspections for the affected engines and removal of the Tay 611-8 engine from the applicability. This AD was prompted by a report of an additional engine failure due to multiple fan blade separation. They are issuing this AD to prevent failure of the LP compressor fan blade, engine failure, and damage to the airplane. This new AD is 2014-06-05 DATES: This AD is effective May 8, 2014. pdf icon 2014-06-05.pdf


AD on Diffuser to high pressure turbine case flange on Pratt & Whitney Engines

March 31st, 2014

The FAA is adopting a new airworthiness directive 2014-05-32 (AD) for all Pratt & Whitney (PW) PW2037, PW2037D, PW2037M, PW2040, PW2040D, PW2043, PW2143, PW2240, PW2337, PW2643, and F117-PW-100 turbofan engines. This AD was prompted by a rupture of the diffuser-to-high-pressure turbine (HPT) case flange. This AD requires a one-time eddy current inspection (ECI) of affected engines with certain diffuser and HPT cases installed. This AD also requires a fluorescent-penetrant inspection (FPI) of the diffuser case rear flange and HPT case front flange. They are issuing this AD to prevent failure of the diffuser-to-HPT case flange, which could lead to uncontained engine failure and damage to the airplane. DATES: This AD is effective May 5, 2014. pdf icon 2014-05-32.pdf


Special Bulletin on Luscombe Model 8A Fuel Systems

March 31st, 2014

This Special Airworthiness Information Bulletin (SAIB) alerts, owners, operators, of all Luscombe Model 8A airplanes equipped with a fuselage mounted main fuel tank and a carbureted Continental A- 65 engine of an airworthiness concern, specifically the need for procedures to prevent the possible loss of power on takeoff and climb. At this time, the airworthiness concern is not an unsafe condition that would warrant airworthiness directive action under Title 14 of the Code of Federal Regulations (14 CFR) part 39. The FAA has revised this SAIB to include additional engine models that may be installed per item 126B of Aircraft Specification A-694 pdf icon CE-14-09R1.pdf