The Pratt & Whitney PW4000 is a family of high-bypass turbofan aircraft engines produced by Pratt & Whitney as a JT9D successor. It made its first run in April 1984, was FAA certified in July 1986, and was introduced in June 1987. With thrust ranging from, it is used on many wide-body airliners.
Development
The 52,000-62,000lb, -fan PW4000 made its first run in April 1984, was FAA certified in July 1986, and was introduced in June 1987. It powers the Airbus A300-600 and A310-300, Boeing 747-400 and 767-200/300, and McDonnell Douglas MD-11 widebodies. The, -fan version development began in December 1991 for the A330, was FAA certified in August 1993, and made its first flight two months later. It received 90min ETOPS approval at introduction in December 1994, and 180min ETOPS approval in July 1995. In January 2000, it was the A330 market leader with more than half of the installed base and one million hours, more than twice that of each competitor. The Advantage70 program was launched at the 2006 Farnborough Airshow, increasing thrust to 70,000 lbf, and reducing fuel burn by about 1% and maintenance costs by around 15%. For the Boeing 777, the, -fan version development began in October 1990, achieved in May 1993, and was approved for 180min ETOPS at service entry in June 1995. The PW4090 entered service in March 1997. The PW4098 received FAA certification in July 1998 and introduced on the Boeing 777-300in September 1999. The 777 launch engine, it entered service on June 7, 1995, with United Airlines. In 2000, over 2,000 PW4000 engines had accumulated over 40 million hours of service with 75 operators. In 30 years between June 1987 and 2017, more than 2,500 engines have been delivered, logging more than 135 million flight hours.
Design
alloys allows higher temperature capability and PW's Floatwall combustor liners improve durability and maintainability. The Talon single-row combustor improves fuel-air mixing, for over 10% better NOx, CO, and HC emissions. It was approved for 180min Extended-range Twin-engine Operations and has a dispatch reliability rate of 99.96%. The average engine stays on wing 13,500 flight hours before a shop visit. The PW4000 is up to 1.7 to 3.4 dB quieter than competitors. It has a Full Authority Digital Engine Control, for better fuel economy and reliability.
