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On November 22, 2013, Boeing issued an advisory to airlines using General Electric GEnx engines on 787 and 747-8 aircraft to avoid flying near high-level thunderstorms due to an increased risk of icing on the engines. The problem was caused by a buildup of ice crystals just behind the main fan causing a brief loss of thrust on six occasions. [403]
Airbus A340, [40] Airbus A380, [41] and Boeing 747 [42] four-engine wide-body aircraft are used to test new generations of aircraft engines in flight. A few aircraft have also been converted for aerial firefighting, such as the DC-10-based [43] Tanker 910 and the 747-200-based Evergreen Supertanker. [44] Some wide-body aircraft are used as VIP ...
The more engines there are, the safer it is if one engine fails. But on the other hand, the more engines there are, the more likely there is to be a failure of one or more and the greater the workload on the flight engineer. Nowadays, two engines are preferred in practice, with even quite large wide-body aircraft having only two engines. Four ...
Pratt & Whitney faced difficulties with the JT9D design during the Boeing 747 test program. Engine failures during the flight test program resulted in thirty aircraft being parked outside the factory with concrete blocks hanging from the pylons, awaiting redesigned engines. Boeing and Pratt & Whitney worked together in 1969 to solve the problem.
American Airlines cited problems with the performance of the engines and airframe, while Singapore Airlines stated that the MD-11 could not operate on the airline's long-haul routes. [18] Pre-flight estimates indicated that the P&W-powered MD-11 was to have a 7,000 nautical miles (13,000 km; 8,100 mi) range with 61,000 pounds (28 t) of payload.
The Airbus A350 is a long-range, wide-body twin-engine airliner developed and produced by Airbus.The initial A350 design proposed in 2004, in response to the Boeing 787 Dreamliner, would have been a development of the Airbus A330 with composite wings, advanced winglets, and new efficient engines.
The Comac C939 is a planned long-range wide-body twinjet airliner family being developed by Chinese Comac as a competitor to the Boeing 777 and Airbus A350. [1] It is designed to be larger than the other two models in its domestically produced aircraft line: the Comac C919 and Comac C929.
The average engine stays on wing 13,500 flight hours before a shop visit (a Shop Visit Rate of 0.073 per thousand hours). It is claimed to be cumulatively 3.4 dB quieter than other engines in its class. [1] Like other modern aircraft power plants, it has a Full Authority Digital Engine Control (FADEC), for better fuel economy and reliability. [4]