From: email@example.com (Gary L Waldman) Organization: Massachusetts Institute of Technology Date: 19 Sep 94 01:28:38 Followups: 1
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I am a little confused with all the speculation centering around the in-flight deployment of the right engine thrust reverser as the cause of the crash. It was my impression that in a cascade reverser, the hydraulic actuators move the nacelle sleeve to the rear, and that during this movement blocker doors linked to the sleeve drop into the bypass flow. If this is the case, how is it possible that the sleeve would have moved at all if only some of the actuators had extended? Unless the force of the opening actuators (i've read any where from 1/3 out of 4/6) was sufficient to damage the "closed" ones, it seems like the reverser should have remained stowed. Another confusing thing is the simulated reenactments of the accident being showed on the networks. The graphics show a target reverser similar to that found on the CFM56 on an A340. It seems possible that activation of some of the actuators could cause a partial thrust reverser deployment. However, this is not the thrust reversing system on the 737 to my knowledge.