PPRuNe Forums - View Single Post - When are you allowed to put your hand back on thrust levers after V1?
Old 25th Apr 2018, 13:04
  #72 (permalink)  
sheppey
 
Join Date: Aug 2011
Location: Australia
Posts: 423
Likes: 0
Received 0 Likes on 0 Posts
Some Boeing pilots, me included, like feedback what the automatics is doing. There have been cases where the A/T has misbehaved. Thrust retarding to/towards idle at thrust reduction is one example.
See: https://en.wikipedia.org/wiki/China_...es_Flight_3943
This is what happened when one throttle failed to advance on levelling out and the crew did not notice it. Automation addiction at its most dangerous.

On another occasion during simulator training of a crew from the above mentioned country, the clutch motor of No 1 thrust lever was failed while the engine was at flight idle. As gear and flaps were lowered during an ILS and power increased by autothrottle to maintain coupled approach, only the No 2 throttle advanced while No 1 throttle remained at idle. The crew did nothing even through the throttle split was obvious. Eventually the autopilot disengaged itself, the aircraft rolled over to the left and entered a spiral dive while the crew watched in horror and did nothing and were mere spectators to the crash. Good job it was a simulator. if the PF had kept his hand on the throttles during the coupled approach he could not have failed to notice only one throttle was working and hopefully(?) would have fixed the problem by disconnecting the A/T and used both throttles manually. Again Automation addiction at its most dangerous..
sheppey is offline