From: firstname.lastname@example.org Organization: IBM T.J. Watson Research Center Date: 08 Nov 96 05:24:22 Followups: 1 2
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I have been following the news in Brazilian newspapers on the cause of the TAM F-100 crash in Sao Paulo, Brazil. Two members of a maintenance crew at the airport witnessed the inadvertent deployment of the thrust reverse in the right engine as the airplane was about to get airborne. The maintenance records indicate uncommanded thrust reverse deployment in flight for this very engine in the last few weeks. I don't know which maintenance actions were taken as a result of this, but if there were none, TAM will probably be found negligent. Of course, none of this is official report yet. This particular airport has a short runway. If the deployment had occurred prior to V1, the crew would have aborted the take-off. If the deployment had occurred later in flight, I imagine the aircraft would have enough speed to return to the airport. From what I know, power requirements for take-offs consider only an engine *failure*, which translates to me as thrust = 0, but never this kind of situation where an engine might actually be contributing with negative thrust. Am I correct?