Pratt & Whitney’s PW4062/F139 engine exclusively powers the U.S. Air Force’s multi-role tanker, the KC-46 Pegasus. Proven in the commercial sector, the PW4062/F139 has a long and distinguished track record of safety, reliability and performance.

Time-Tested Reliability


The PW4062/F139 is a variant of the PW4000 commercial engine family with a long and distinguished track record of proven performance. In service since 1987, the PW4000 has accrued more than 140 million dependable flight hours and is currently in use by nearly 70 operators worldwide.

Superior Fuel Delivery and Operating Economics


Two Pratt & Whitney PW4062/F139 engines exclusively power the U.S. Air Force’s KC-46 Pegasus multirole tanker, which can refuel all allied and coalition military aircraft compatible with international aerial refueling procedures and carry passengers, cargo, and patients.

Maximum Durability, Minimal Maintenance Needs


The PW4062/F139 delivers excellent operational flexibility with superior fuel efficiency and reliability, averaging more than 16,000 hours on-wing before a shop visit is required. The engine’s world class performance and reliability translates to lower maintenance costs for the U.S. Air Force.