The helicopter’s altitude-measuring instrument was also inaccurate, investigators said at the first of three days of hearings examining the January crash.
The goal of the hearings is to pinpoint exactly what went wrong and how to avoid similar midair crashes between passenger planes and military aircraft.
Thousands stood in respect on Vilnius' streets as hearses carried the bodies of the four soldiers to the airport before being flown to the U.S. for burial.
