Incident Overview
A takeoff incident occurred when N341PL, a light aircraft, began its takeoff roll on Runway 31L while a Boeing 747 was taxiing on the outer parallel taxiway located 375 feet to the right of the runway centerline. The 747 stopped momentarily before making a 90-degree left turn onto Taxiway KK. At that time, N341PL had been cleared for takeoff and commenced its roll.
Pilot Observations
The pilot of N341PL reported seeing light snow behind the 747 but was not concerned because the 747 had stopped. However, the tower controller and another witness noted an increasing amount of snow being kicked up behind the 747 as it turned off the outer taxiway.
Flight Path and Conditions
After lifting off, the pilot remained in ground effect while accelerating to climb speed, a procedure he stated he was trained to use on all takeoffs. The pilot reported that after calling for gear retraction, he entered a whiteout condition, leveled his wings from a roll, and encountered a downdraft. The aircraft emerged from the snow cloud and struck the runway approximately 1,100 feet before passing behind the Boeing 747.
Training Context
Flight Safety International stated that during ground and simulator training, they recommend a positive rate of climb in instrument meteorological conditions (IMC) and at night.
Post-Incident
The aircraft sustained damage upon striking the runway. No information was provided regarding injuries to occupants or other parties.