Originally Posted by
tdracer
I can't comment on brakes, but it's pretty universal on high bypass engines to inhibit reverser operation unless "on-ground" is true (although the detail logic of "on-ground" is highly aircraft dependent).
If you're wondering why, lookup Lauda 767 accident...
"Louder 004" raised two things:
1. The failsafe autostow system didn't on the PW4060...
2. the modeling of controllability did not acurately account for the lift loss in the wake of the engine's reverse plume or the added drag from that cause.
A lot of negative comments were made early on about the crew's competency until the revised data was on hand, and that stopped much of the noise.A type I still fly has just dumped a plane in the dirt due to a TR deployment, they are not much fun, and the crews response when the system doesn't play ball is about the same as entering auto in an R22 with an engine failure, getting the N1 down to idle if the system doesn't is fairly desirable.