Medford-Rogue Valley

The airplane was departing into instrument meteorological conditions using a standard instrument departure. The takeoff instructions consisted of making a climbing right turn direct to a nondirectional beacon. After departing, the pilot made a radio communication to an air traffic controller asking if he will tell him when to turn. The controller replied that he would not be calling his turn and that the pilot should fly the departure as published making a climbing right turn to overfly the approach end of the runway. The pilot acknowledged the communication, which was his last transmission. The airplane made a 360° turn and descended below the cloud layer. The airplane then climbed back into the cloud layer and made an inverted loop, descending into the ground in a near-vertical attitude. A postaccident examination of the airplane revealed no evidence of preimpact mechanical malfunctions or failures. Recorded audio of the airplane before the accident was consistent with the engines operating. The signatures on both propellers were consistent with one another and consistent with the engines operating at a similar rpm. The pilot was qualified and recently underwent recurrent training. The reasons the pilot became spatially disoriented could not definitely determined. The pilot left the anti-collision lights on while in the clouds, which may have resulted in him having flicker vertigo.

The pilot reported a loss of power on both engines during descent to land. Approximately 3 minutes prior, tower gave pilot option of 'straight-in' to runway 14 or regular pattern to runway 32. The pilot hesitated and said 'just a minute' and tower offered wind info as '210 at 13.' Pilot replied, 'kay.' Approximately 1 minute later pilot said '33W will make a left base for 14.' Tower cleared him and declared visual contact. Pilot acknowledged '3 whiskey.' One minute and 54 seconds later, pilot declared power loss and emergency. Tower rogered. Seven seconds later, pilot said 'gonna hit it' followed 2 seconds later with an unintelligible comment. Witnesses saw the aircraft gliding wings level toward runway when a loud 'rev' was heard, the aircraft pitched up and rolled left to an inverted position before ground contact and explosion. Post accident investigation did not disclose any engine or fuel system malfunction. This aircraft had experienced a power loss after descending from 15,500 to 12,000 feet msl on 2/2/85 with the same pilot as reported by the copilot on that flight. After approximately 1 1/2 minutes power was restored. All four occupants were killed.

The crew was involved in a local test flight and the twin engine airplane was used for an electronic test project mission. For such program, a special authorisation was granted to use the aircraft in an overweight configuration. After liftoff, during initial climb, the airplane encountered difficulties to gain height and its speed was too low. It stalled, struck the ground and crashed in flames. All four occupants were slightly injured and the aircraft was destroyed.