The names of the pilot and passenger aboard the medical helicopter that crashed last Thursday on the roof of the 11-story Spectrum Health Butterworth Hospital, bursting into flames, were finally released.

Aero-Med Raymond Sampson, 61, was piloting the helicopter being accompanied by passenger Willard Elliot, 57, who, according to the Detroit Free-Press, was a Federal Aviation Administration inspector from Grand Rapids.

Both of them suffered injuries, but they managed to escape before the helicopter burst on fire. Elliot was treated for minor injuries and released from Butterworth the same day, while Sampson suffered a collapsed lung and was hospitalized until Saturday when he was sent home.

He flew in the Vietnam War and he has been a pilot for the hospital’s Aero Med rescue service for 21 years.

Officials from both the FAA and the National Safety Board declined to speculate on the crash’s cause, but most probably, a mechanical failure appeared to have led to the incident.

After the crash, the hospital’s power went out, forcing doctors to cancel all scheduled surgeries. Also, patients were relocated from the top floors of the hospital to other floors, while the emergency room was closed, forcing those in need of emergency help to head to other area hospitals.

According to Fire Chief John VanSolkema, it was too soon to estimate the damages resulting from the crash.