Originally Posted by
tcasblue
Our company sent out a memo talking about this incident stating that it was a TCMA issue with reverse selected just prior to touchdown(if possible), reversers activating upon touchdown with full reverse selected followed a quick cancellation of reverse thrust selection.
Some pilots have a very bad habit of lifting the reverse levers prior to touchdown - depending on the air/ground logic to prevent deployment until they actual land. The good news is that, since Lauda, the air/ground protection is good enough that the probability of the reversers actually deploying prior to touchdown is very remote - the bad news is that if there is some sort of latent fault that allows a reverser to deploy, they'll probably crash
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We did a big investigation of this on the 757 years back, where lifting the reverse levers was causing a rash of nuisance fault messages. We instrumented a couple in-service 757s and sure enough, about 1% of the landings they were lifting the reverse levers prior to touchdown - sometimes by as much as 10 seconds
All that being said, I'd be hard pressed to come up a scenario for how doing that could cause a nuisance TCMA trip...