jtchew@csa2.lbl.gov (JOSEPH T CHEW) (02/28/91)
From: jtchew@csa2.lbl.gov (JOSEPH T CHEW) The following message was posted in today's COMP.RISKS, a newsgroup that treats risks caused by computers and related technology. I'm just relaying it; questions about its content should go to its author at the address given in the last line. He didn't state whether it was a re-engined variant with modern turbofans like the KC-135R or an original, straight-turbojet plane such as the KC-135A; both are operational in the Gulf war. --Joe "Just another personal opinion from the People's Republic of Berkeley" >According to Flight International [27 Feb-5 March 1991. Page 8]: >A Boeing KC-135 apparently had two engines break off, shortly after >take-off, during Desert Storm operations in the Gulf. Apparently, autopilot >malfunction overstressed the airframe, causing one engine to break away and >hit a second, which was also torn from the wing. The 'plane is repairable, >which says a lot for the pilot's skill! >According to the caption on the accompanying picture (of an undamaged, >4-engine USAF KC-135) "KC-135s have overstressed in the past because of >autopilot disconnects". >Apparently, the 'plane performed a dutch roll, which can lead to overstrain >of the airframe because of the divergent coupling of roll and yaw. >Martyn Thomas, Praxis plc, 20 Manvers Street, Bath BA1 1PX UK. >Tel: +44-225-444700. Email: mct@praxis.co.uk