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The Pratt & Whitney PW4000 is a family of dual-spool, axial-flow, high-bypass turbofan aircraft engines produced by Pratt & Whitney as the successor to the JT9D.It was first run in April 1984, was FAA certified in July 1986, and was introduced in June 1987.
An airworthiness directive (commonly abbreviated as AD) is a notification to owners and operators of certified aircraft that a known safety deficiency with a particular model of aircraft, engine, avionics or other system exists and must be corrected. [1] [2]
The Pratt & Whitney PW1000G family, also marketed as the Pratt & Whitney GTF (geared turbofan), is a family of high-bypass geared turbofan engines produced by Pratt & Whitney. Following years of development and testing on various demonstrators, the program officially launched in 2008 with the PW1200G destined for the Mitsubishi SpaceJet (a ...
In an airworthiness directive published on Friday, the FAA requires an ultrasonic inspection of the first- and second-stage high-pressure turbine disks within 30 days. ... Pratt & Whitney parent ...
The 777-200ER's Pratt & Whitney PW4000 and the A330-300's Rolls-Royce Trent 700 engines rose from a share of 18–25% in 2001 to 29–40% in 2013. For the Airbus A320neo and Boeing 737 MAX , between 52% and 57% of their value lies in their engines: this could rise to 80–90% after ten years, while new Airbus A350 or Boeing 787 engines are ...
In March 2011 the FAA issued an Airworthiness Directive restricting operation of the entire fleet of EA500s to 30,000 ft (9,144 m) from its previous limit of 37,000 ft (11,278 m) and before that 41,000 ft (12,497 m). The AD was required because a build-up of hard carbon deposits on the engine static vanes caused at least six reported engine ...
A standard airworthiness certificate ceases to be valid when the aircraft ceases to be registered. Change of ownership of an aircraft does not require re-issue or re-validation of that aircraft's standard airworthiness certificate. In contrast to a standard airworthiness certificate, an aircraft may be issued with a special airworthiness ...
One airworthiness regulation is found in ICAO international standard of Annex 8 to Chicago Convention on International Civil Aviation which defines "airworthy" - in respect of an aircraft, engine, propeller or part there of - as "The status of an aircraft, engine, propeller or part when it conforms to its approved design and is in a condition for safe operation".