Lanai

Shortly after takeoff from runway 04L at Honolulu-Daniel K. Inouye Airport, while climbing, the single engine airplane entered a left bank instead initiating a right turn as instructed by ATC. The airplane then descended into the ground and crashed on a vacant building, bursting into flames. The airplane was totally destroyed and both occupants were killed.

The airplane departed during dark (moonless) night conditions over remote terrain with few ground-based light sources to provide visual cues. Weather reports indicated strong gusting wind from the northeast. According to a surviving passenger, shortly after takeoff, the pilot started a right turn; the bank angle continued to increase, and the airplane impacted terrain in a steep right bank. The accident site was about 1 mile from the airport at a location consistent with the airplane departing to the northeast and turning right about 180 degrees before ground impact. The operator's chief pilot reported that the pilot likely turned right after takeoff to fly direct to the navigational aid located southwest of the airport in order to escape the terrain induced turbulence (downdrafts) near the mountain range northeast of the airport. Examination of the airplane wreckage revealed damage and ground scars consistent with a high-energy, low-angle impact during a right turn. No evidence was found of preimpact mechanical malfunctions or failures that would have precluded normal operation. It is likely that the pilot became spatially disoriented during the right turn. Although visual meteorological conditions prevailed, no natural horizon and few external visual references were available during the departure. This increased the importance for the pilot to monitor the airplane's flight instruments to maintain awareness of its attitude and altitude. During the turn, the pilot was likely performing the additional task of engaging the autopilot, which was located on the center console below the throttle quadrant. The combination of conducting a turn with few visual references in gusting wind conditions while engaging the autopilot left the pilot vulnerable to visual and vestibular illusions and reduced his awareness of the airplane's attitude, altitude, and trajectory. Based on toxicology findings, the pilot most likely had symptoms of an upper respiratory infection but the investigation was unable to determine what effects these symptoms may have had on his performance. A therapeutic level of doxylamine, a sedating antihistamine, was detected, and impairment by doxylamine most likely contributed to the development of spatial disorientation.

The airplane was loaded with mail & freight within 57 lbs of its max takeoff weight limit. No malfunction was noted during start or taxi. The pilot made a near-midfield intersection departure from runway 08L at 0622:35 local time. Seconds earlier, a Boeing 747 had completed its landing roll-out on runway 4R, which crossed runway 8L near its departure end. Winds were from 285° at 2 kts. The pilot and loader (a private pilot) said nothing unusual occurred during takeoff until the aircraft climbed to 100 feet agl, then 'suddenly the airplane yawed to the left as though the left engine had lost power.' Despite use of full right rudder, directional control was lost, and the pilot decreased the pitch attitude because of 'severe yawing and rolling tendencies.' The airplane's left wing tip impacted the right side of the runway, the tricycle gear collapsed, and the airplane slid to a stop and was consumed by fire. Due to fire damage and lack of accurate records, neither the total fuel load, the freight's actual weight, the cargo's preimpact location within the aircraft, nor the adequacy of the cargo tie down system could be validated. Weight and balance documents filed with the FAA were at variance with 'duplicate' documents held by the operator. Exam of the engines did not reveal evidence of a preimpact failure. Propeller ground scars on the runway indicated both engines were operating during impact. The accident occurred during the pilot's last flight as an employee with the company.

The pilot said that the approach to the airport was normal, with a 100 knot indicated airspeed. The pilot said the winds were about 110° at 10 knots during the approach; however, on short final he encountered a very strong gust from the right. The pilot corrected for the wind gust then it stopped and the aircraft suddenly dropped hard to the runway without warning. The pilot said he suspected a windshear encounter was responsible for the accident. Witnesses said the approach seemed normal when the aircraft suddenly dropped to the runway and bounced. The witnesses said that a thunderstorm had passed through the area just prior to the aircraft's approach.

Shortly after takeoff, the pilot requested an 'immediate downwind' to return to the airport and was cleared to land. When asked if equipment was needed, he replied, 'negative, sir, a little matter of fuel.' A witness said the aircraft appeared very low on final approach with both props turning. The aircraft crash landed short of the runway, went thru a perimeter fence and came to rest on an incline about 10 feet short of the runway. The pilot received a head injury and couldn't remember many details of the occurrence. In an early interview, he induced there was a partial power loss and the aircraft yawed, but he couldn't remember which engine 'cut out first.' Later, he was unable to recall losing power. Six gallons of fuel was found in the left main tank, about 1.5 gallon was in the right main tank. The left fuel selector was found in the 'main' position, but due to damage and rescue activities, the position of the right fuel selector was not determined. Both auxiliary pump switches were in the 'off' position. The left propeller control was in the feather position, but neither propeller had feathered. Each main tank held one gallon of unusable fuel. A test of the pilot's blood showed 0,45‰ alcohol.

En route from Honolulu to Lanai, while cruising along the coast, the twin engine airplane went through a stormy area when control was lost. It crashed into the sea offshore and was destroyed. All eight occupants were killed.