the first officer's inadvertent application of full nose-up trim during a prolonged flare, resulting in an excessive pitch angle during landing and subsequent tailstrike. Contributing to the accident was the flight crew's failure to correct the airplane's drift from the centerline approach course during short final approach, leading to the prolonged flare, and their improper decision to perform a practice autoland approach using a restricted procedure.

inadequate visual lookout by the flightcrew of the Delta Boeing 757, N622DL, and their failure to follow procedures and directives by not closely following the ramp marshals' signals.