The FAA will contract with Pratt & Whitney to modify an F117 turbofan engine—the military version of the PW2000—for a volcanic ash study involving NASA and the U.S. Air Force (USAF). P&W’s F117 powers USAF’s C-17 four-engine military transport aircraft, one of which will be used for the study, which is scheduled to start in March. The ground will inject ash into the modified engine. “A key element of this test is to provide a means for engine ingestion of volcanic ash, which ...


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