The FAA is adopting a new airworthiness directive for all Pratt & Whitney Canada PT6A-114 and PT6A-114A turboprop engines. It requires initial and repetitive borescope inspection of compressor turbine blades (CT), and the removal from service of blades that fail inspection. This AD was prompted by several incidents of CT blade failure, causing power loss and engine failure. The purpose of the AD is to prevent failure of CT blades, which could result in damage to the engine and the airplane.
Turbine engine failure
The second Bombardier CSeries CS100 flight-test vehicle returned to the air on September 7 after more than a three-month hiatus. FTV2 took off at 6:10 p.m.
Bombardier confirmed on Friday that the modified Pratt & Whitney PW1524G engines for the CSeries flight-test vehicles have successfully completed the testing required for return to flight test and that the second test vehicle (FTV2) will return to the air this month.
The engine failure that occurred during ground testing of the first Bombardier CSeries flight test airplane on May 29 originated in the low-pressure turbine, according to the airframe maker.
The FAA is proposing to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Canada PT6A engines. The proposed AD was prompted by in-service events involving the perforation of engine cases as a result of the liberation of power-turbine blades and the fracture/displacement of the power-turbine containment ring.
The Australian Transport Safety Bureau (ATSB) on June 27 released the final report of its investigation into an uncontained engine failure aboard a Qantas Airbus A380 in November 2010 just after departure from Singapore.
The FAA is adopting an airworthiness directive for certain Pratt & Whitney Canada PT6A-38, -41, -42, -42A, -61, -64, -66, -66B, -110, -112, -114, -114A, -121, -135, and -135A series turboprop engines. The AD requires the removal from service of certain PMA replacement parts from Timken Alcor Aerospace Technologies, including first-stage sun gears and planet gears installed in the reduction gearbox. This AD was prompted by failures of certain first-stage sun gears manufactured by Timken Alcor.
A preliminary factual report released today by the Australian Transport Safety Bureau recounts a laudable effort on the part of the five-member flight crew to land the Qantas A380 stricken by the uncontained failure of one of its Rolls-Royce Trent 900 turbofans over the Indonesian island of Batam on November 4.
Qantas plans to resume Airbus A380 service this Saturday (November 27) on Flight QF31 from Sydney to Singapore and onward to London. The flight, scheduled to depart Sydney at 5:30 p.m. local time, would mark the end of a 23-day suspension of service with Qantas A380s after an uncontained engine failure forced one of the airline’s six superjumbos to make an emergency landing in Singapore on November 4.
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