Incident Overview
The pilot-in-command of a Piper Aerostar, registration N3643R, reported a loss of control during climbout after departing from runway 08R at Stapleton Airport. According to the pilot, he waited approximately 90 seconds after a Boeing 727 departed the same runway, citing concern about possible wake turbulence. He then used a short field takeoff procedure to climb above the flight path of the preceding aircraft.
Loss of Control
During the climbout at about 600 feet, the aircraft began an uncommanded roll to the left. The pilot stated that he regained roll control only moments before the aircraft impacted the ground. The Piper Aerostar is not certificated with a stall warning device.
Weather Conditions
The wind at the time of departure was from 170° at 20 knots, with gusts to 28 knots. According to the pilot operating handbook, the demonstrated crosswind component for the aircraft is 15 knots.
Occupant Injuries
All four occupants aboard N3643R sustained injuries, with one occupant suffering serious injuries, as reported by the pilot.
Probable Cause
The official investigation identified the probable causes of the accident. For the loss of control during initial climb, the findings include: the pilot-in-command exceeded the aircraft's weight and balance limits; company-induced pressure influenced the pilot's decisions; the pilot disregarded wind information; the pilot failed to maintain proper airspeed; and the pilot did not correct a stall or mush condition. The subsequent collision with terrain occurred during an emergency descent phase.