United States of America

The airplane crashed at the 1,800 foot level of a mountain pass, near Kodiak, Alaska. The airplane was substantially damaged and the pilot and one passenger were seriously injured and four passengers received minor injuries. At the time of the accident the pass was reported closed due to IFR weather conditions.

The crew arrived at the airport about 20 minutes before the planned midnight takeoff time, after the pilot-in-command had spent the day moving furniture. A night watchman noted that the preflight inspection and takeoff roll to rotation/lift-off was normal. There was no post-takeoff radio call to either unicom or ATC, although the crew had filed an IFR flight plan. After taking off from runway 36, the aircraft crashed about 1.8 mile north of the runway. The wreckage was found after interruption of electrical power to a nearby city. Initial impact was with trees, while in a shallow/left/descending turn. An area of trees about 1/2 mile long was damaged by impact and fire. Before coming to rest, the aircraft hit a powerline support tower. There was evidence the aircraft was traveling at about 260 knots, when it crashed. No preimpact part failure or malfunction was found that would have resulted in the accident. Both pilots were killed.

Immediately after takeoff at 200-300 feet agl, a portion of fabric separated from the right aileron. While maneuvering the aircraft the pilot's control wheel became free, and he elected to ditch using full rudder and differential power. Examination of the pilot's control wheel aileron control chain revealed that the chain failed due to overload. The right seat was occupied by a mechanic employed by the operator and held a private pilot certificate with single and multi engine rating. He stated that he suggested to the pilot that his controls were functioning normally, but the pilot disagreed and proceeded to ditch the aircraft. Examination of the right control yoke revealed aileron movement in the correct direction.

Eleven minutes after departure the pilot reported smoke and a right engine problem, then said 'going down'. Right wing and engine assemblies separated in flight. Fire damage vicinity of right engine left turbocharger; tailpipe assembly had separated. Heavy smoke and heat damage between right wing forward and aft wing spars. Tailpipe had failed in fatigue near flange where attached to turbocharger exhaust port. Evidence of non-uniformly seated gasket between flanges. Also, right engine lower left engine mount deteriorated; significant portion of rubber missing. Piper sb #818 (ad87-07-09) accomplished 5/21/88; requires removal and inspection of exhaust system for cracks and reinstallation with new flange gaskets.

After obtaining a weather briefing in which he was informed of thunderstorms and current sigmets for his intended route of flight, the pilot elected to depart his home airport on a personal flight. At the time of departure, witnesses indicated the presence of thunderstorms adjacent to the airport. After trying to obtain his IFR clearance from charlotte, the pilot was issued his IFR clearance when approaching Columbia, SC. The pilot had deviated around at least one thunderstorm while approaching Columbia. The pilot had been cleared to climb to his requested altitude of 17,000 feet and had reached 16,400 when the radar return was observed to indicate a descent and then was lost. Witnesses on the ground reported seeing the airplane exit the clouds in flames. The evidence indicated that the horizontal tail had separated followed by the wings and other components of the airplane. No evidence of separation due to structural weakening from heating was found. All four occupants were killed.

The left engine lost power just after takeoff. With the gear and flaps retracted and the left propeller feathered, the airplane would climb slightly. As it passed over green fields, the airplane started a descent. The airplane touched down in a cotton field and the left tip tank burst into flames as it touched the ground. The airplane was consumed by fire. Engine teardown revealed the number three exhaust valve failed. Elevation of the accident was 1,600 feet mst, OAT was 114° F. Density altitude was approximately 5,600 feet.

Scenic Air Tours flight 21 (Beech H18, N34AP) was on an air taxi, sightseeing flight from Hilo to Kahului, HI. The pilot took off at approximately 1300 hst. After takeoff, flight 21 proceeded northwest along the coastline at an altitude of about 2,000 feet. The aircraft subsequently crashed in a scenic canyon area near a waterfall in Waipio Valley, approximately 50 miles northeast of Hilo. Impact occurred at an elevation of about 2,800 feet, approximately 600 to 900 feet below the rim. No preimpact mechanical problem of the aircraft or engines was found. A passenger, who was on a previous sightseeing flight, reported the pilot had maneuvered below the rim of a canyon. Company officials reported that flying below rims of canyons was against company policy; however, the operations manual did not contain any guidance or cautions about such operations. All 11 occupants were killed.

The aircraft made a hard landing, ran off the right side of the runway and collided with the terrain. Subsequently, the plane erupted in flames and was destroyed, but the pilot and passengers were not injured.

The pilot stated that 15 minutes prior to arrival he notified the hospital and asked them to check the runway. As he entered downwind security advised him of animals on the runway so he circled until they called back stating it was clear. Just as the airplane was touching down, two horses began to cross the runway. The pilot attempted to go-around; however, the airplane contacted both animals and the pilot elected to abort the go-around. The left main landing gear collapsed and the airplane slid to a stop. A post crash fire ignited and was extinguished shortly thereafter. The landing was being made during dark night conditions.

After being cleared to descend to 12,000 feet and to deviate around a 'big cell', the aircraft entered an area of level two and three thunderstorms. Subsequently, an in-flight breakup occurred and wreckage was scattered over a four mile area. During the breakup, the right wing and empennage separated from the aircraft. The left wing and spar also failed at the same location as the right wing, but the left wing remained with the fuselage. No pre-accident failure, malfunction or metal fatigue of the aircraft was found drg the investigation. All three occupants were killed.