Runway excursion by DL MD-80

[skyhighfallguy]

Dear ZEFFY

thanks for posting!

The MD80 series should have its nose wheel on the ground PRIOR to selecting thrust reverse.

Overboosting on thrust reverse and, LEFT engine putting out more power than Right, which would pull the plane to the LEFT, which is what happened. Though the timing might be slightly off. Rereading this shows the heading change at six seconds with the assymetric reverse at six to seven seconds, but close.

This may also give credence to the rudder blanking at high thrust reverse.

THINGS they should have done.

Delayed thrust reverse until nosewheel on ground and directional control established
Select thrust reverse at 1.3 epr instead of 1.9 to 2.07.



Sounds like a big OOOOPS in the front end of the plane.