Originally Posted by
flyingchicken
Because the differential thrust is not being used to decrab the airplane - the rudder is still doing that. The thrust is being used to create additional sideslip normally supplied by wing drop, which IS limiting because of pod strike considerations.
Agree. But when the rules of man comes against the laws of physics, who wins?
My FCOMS tell me not to dick around with differential reverse on rollout either. But if the **** hits the fan and we start sliding towards the edge, I know which lever I need to pull to get us back on centerline.
Additional sideslip and additional crab all of which needs to be taken out at derotation, complicating directional control.
Ah, the rules of man, in this case the man is not keeping you down. Many of those rules are written in blood and they don't counter the laws of physics-they work every day.
I don't know what an FCOM is but they follow Boeings current guidance. Reduction to idle reverse or forward idle is their recommendation in the event of questionable directional stability on rollout. Maybe they figure you might grab the wrong side in the heat of the moment, impossible I know, but just saying. Last ditch effort? Do whatever it takes, it is always better to crash on an airport.
