Test flights of a Boeing 707-320 with one JT8D-219 and three JT3Ds start this month in preparation for more tests in November, when all four JT3Ds will be replaced by the newer engine. The re-engining effort is led by San Antonio, Texas-based Seven Q Seven and involves Omega Air, Ed Swearingen, Pratt & Whitney, DER Engineering, Nordam and BFGoodrich. DER Engineering is co-ordinating the certification effort, while Nordam is providing cowl doors and struts. BFGoodrich is integrating the engine with the nacelle as well as Boeing MD-80 style inlets and reversers. The 7Q7 is expected to gain US Federal Aviation Administration certification by the end of the second quarter of next year. BFGoodrich hopes the programme could cover as many 50 aircraft.
Source: Flight International
