From: Stephen L Nicoud <email@example.com> Date: 16 Dec 93 01:50:43 PST
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In the 12/10/1993 Aviation Daily: ------- Included Message ------- FAA To Require Modification Of 747s With JT9D Engines FAA plans to require modification of the thrust reverser control system on Boeing 747s powered by Pratt & Whitney JT9D engines. The modification involves installing a solenoid-operated shutoff valve to prevent deployment of the engine fan thrust reverser during flight, which can reduce the controllability of the aircraft, FAA said. The agency said there have been "numerous incidents of inadvertent in-flight deployment" of the engine fan thrust reverser on aircraft with the JT9D engines. FAA estimated that it will cost $16,000 to modify the engines. The cost for the 126 U.S.-registry aircraft that are affected - out of 223 worldwide - will be just over $2 million, the agency said. FAA allowed that the modification will "require a large number of work hours to accomplish," but it said the proposed 24-month compliance period should make it possible to do the work during scheduled major inspection and maintenance. ------- End of Included Message ------- Stephen -- Stephen L Nicoud <stephen.nicoud@Boeing.Com> bcstec!bcsaic!stephen.nicoud This message does not represent the views of Boeing. I am not a Boeing spokesperson. I reserve the right to revise, extend and/or revoke my remarks.