United States of America

Shortly after takeoff on a check-out flight the aircraft was observed on crosswind leg to descend until impact. There was an extensive post impact fire. Witnesses heard the aircraft make a 'poof' type of noise just as the pilot radioed the control tower and stated that he was experiencing an emergency of unknown nature. The paper air filter element for the left engine exhibited the presence of oil, and the left side of the aircraft had evidence of oil spatter and streaking. Both occupants were killed.

The aircraft crashed off the end of runway 23 during an attempted go-around after touchdown. The pilot stated that after the aircraft touched down approximately 300 feet down the 2,760 foot runway he raised the flaps along with the nose of the aircraft to slow down. Brakes were applied and the left main gear skidded 2/3 the way down the runway at which time full power was applied to go-around. The aircraft mushed off the end of the runway where it contacted a rock pile and was destroyed by impact and post crash fire. The pilot reported winds from 270° at 10 knots when the accident occurred.

N4877V arrived over Clarion County Airport at about 2100 hours, and commenced a visual approach for landing. Marginal visual weather conditions prevailed at the time of the accident. The flight was observed by another pilot waiting on the ground for the aircraft. This pilot reported that the aircraft was seen through a break in the clouds as it turned left, southwest, as if to establish a left downwind for runway 05. The aircraft was located in a wooded area southwest of the airport. An examination of the wreckage failed to indicate any malfunction or system failure. The aircraft impacted the ground in a nose low attitude and the wreckage was confined to an area indicative with a stall type accident. The pilot, sole on board, was killed.

The aircraft collided with the ground after stalling during takeoff. Witnesses reported that the aircraft pitched up in two increments, climbed sharply to about 200 feet agl, stalled dropped the right wing and descended, impacting the ground in a flat attitude.

The aircraft departed during a break in the weather after having waited for a special VFR departure. His departure radio call was the last communication from the flight. The weather remained marginal with icing in the clouds and freezing drizzle. The aircraft was on a flight to transport a dentist and a technical assistant to area villages for US Health Dpt clinical work. There was no pressing or urgent need to adhere to a schedule if the weather dictated a postponement. Aircraft wreckage was located on the side of a mountain at 650 feet above msl. It had collided with an upgrade while in a descending turn. The aircraft broke apart and left wreckage for a distance of 493 feet before coming to rest. The pilot and one passenger remained in the wreckage. The right front passenger was ejected and located near the wreckage. Witnesses at the crash site noted ice 1/8 to 3/4 inches thick on the broken wings and airframe parts during the recovery.

The pilot experienced inadequate left engine manifold pressure during a takeoff attempt at Newport. The takeoff was aborted and afterwards the pilot decided to ferry the aircraft to New Bedford for inspection. The engine were restarted and operation was good. The flight to New Bedford was without incident until the aircraft was on a two miles final to runway 05 at this time the left engine stopped while the pilot attempted to feather the engine, both the engine and part of the left wing caught on fire. The pilot continued to the airport with the flaps and gear down and a speed at 125 mph. The pilot stated he was in a good position to land when he heard a loud bang which he described sounded like a cable. The aircraft entered a 25° left bank. He leveled the wings by reducing right engine power. Collision with trees to the left of the runway occurred afterwards. Examination of the aircraft disclosed that the left engine exhaust manifold header assembly, which is connected to the turbocharger, was cracked along a weld seam. Also revealed was that the aileron cables that are routed behind the left engine were burned to separation. Both occupants were injured.

At rotation the right engine failed. The aircraft entered a skidding turn to the right and continued to climb to about 100 feet agl. During the turn 110° from takeoff. Heading aircraft rolled inverted and descended into a car port. Extensive post impact fire destroyed aircraft, car port and three vehicles. Gear was not retracted and propellers was not feathered. During post accident exam of the right engine extensive internal damage was found. Both occupants were killed.

Aircraft took off in clear weather but below-freezing temperatures with heavy frost on aircraft surfaces. No preflight, run-up or warm-up performed. On initial climb, left engine power loss occurred for undetermined reason, but probably associated with temp/cold engine operation. Pilot turned into dead engine in apparent course reversal, failed to feather propeller and lowered landing gear during turn. Aircraft stalled, rolled inverted and crashed into residential area. Engine teardown revealed no mechanical defects. Post-mortem and toxicological tests revealed no physiological impairment. All three occupants were killed.

During final approach the pilot noticed aircraft flying 'unusual' and elected go-around. During power-up, the aircraft lost power and a forced landing was made on a residential street near the airport. The pilot stated that he had inadvertently placed the fuel selector in crossfeed and had exhausted the fuel supply in the right wing by feeding both engines. There were no reported mechanical problems prior to the accident.

During arrival, the pilot advised ARTCC that the destination airport appeared to be covered with fog. She then canceled her IFR flight plan. According to ground witnesses, the aircraft made several passes over the airport. Witnesses also reported that the horizontal visibility was nil, but they could see blue sky directly above. During the last pass, the aircraft crossed over the approach end of the runway with the gear and flaps extended, angling to the left of the runway heading. Moments later, witnesses heard the engines go to full power, then silence followed. The aircraft was found where it impacted rising snow covered terrain approximately 1/8 mile south of the midpoint of the airport. There was evidence that the aircraft was in a steep descending, right wing low attitude when it crashed. No preimpact part failure/malfunction was found. A passenger was seriously injured while five other occupants were killed.