SUMMIT COUNTY, Colo. (CBS4) – The National Transportation Safety Board has finished its investigation into a medical helicopter crash that killed a pilot and injured two others in 2015.

They found that copter design and pilot error both played a role in the deadly crash.

READ MORE: Tammsha Rice-Williams Arrested In Connection With Deadly Shooting At N. Colorado Blvd. & E. Colfax Ave.

(credit: Lake Dillon Fire)

Pilot Patrick Mahany died. Nurses Matt Bowe and Dave Repsher were both injured.

Patrick Mahany (credit: CBS)


Repsher barely survived, with burns over 90 percent of his body.

READ MORE: Golden Eagle Released Back Into The Wild After Rehab For Injuries That Left Bird Near Death

Dave Repsher, left, and Matt Bowe, right (credit: CBS)

The families have sued the manufacturer, Airbus Helicopters, saying the copter had a malfunction in its tail rotor.

The NTSB believes the pedals were misconfigured before the accident and the copter did not have an alert to let pilots know about the problem.

They also say the pilot did not perform a hover check, which would have let him know about the problems in controlling the helicopter.

Statement From The National Transportation Safety Board 

MORE NEWS: Study: Fort Carson Named Among Army Posts Where Female Soldiers Face Greater Risk Of Sexual Assault

“The National Transportation Safety Board (NTSB) is providing the following information to urge the Federal Aviation Administration (FAA) and the European Aviation Safety Agency (EASA) to take action on the safety recommendations in this report. These recommendations address the need for owners and operators of existing AS350 B3e helicopters and similarly designed variants to incorporate a crash-resistant fuel system into their rotorcraft. These recommendations are derived from two 2015 accidents in which the impact forces were survivable for occupants but fatal and serious injuries occurred because of post crash fires that resulted from an impact-related breach in the fuel tanks. As a result of these investigations, the NTSB is issuing three safety recommendations tithe FAA and one safety recommendation to EASA.”