United States of America

While being vectored for an ILS runway 07 approach, the pilot was told to maint 3,000 feet and advised he was following a Boeing 727. The minimum approach altitude before intercepting the ILS glide slope at the final approach fix/outer marker was 1,900 feet. As the aircraft was approaching the outer marker, the pilot was cleared for the approach and was handed off to the tower. After contacting the tower, the pilot was told to descend as published. At approximately that time, the tower controller and his supervisor discussed N700CM's altitude and proximity to the 727. The controller was going to discontinue the approach, but his supervisor suggested he wait and see if it would work out. Subsequently, N700CM crashed into trees approximately 5,800 feet short of the runway while descending in a wings level attitude. Radar data showed N700CM was well above the ILS glide slope when cleared for the approach. ATC procedures requested the aircraft to be below the glide slope before being cleared. Also, N700CM was approximately 2.57 miles behind the 727, but stayed well above the 727's flight path (and possible wake turbulence) until moments before impact. N700CM entered an excessive rate of descent before going below the glide slope. Both occupants were killed.

The pilot initiated an ILS approach in below minimum weather conditions shortly after night fall. He was given a low altitude alert, but continued the approach. He announced a missed approach, and indicated problems climbing to altitude. He then declared an unspecified emergency, and requested vectors to a larger airport, in spite of worsening weather conditions. He reached an altitude of 2,100 feet, but commenced another ILS approach despite previous difficulties. Radar data indicates excessive maneuvering to intercept the inbound course, with wide variations in ground speed and altitude. Following a steep climb at a low groundspeed, the aircraft disappeared below radar coverage. Witnesses indicated irregular engine sounds as the aircraft made a tight level turn at low altitude prior to impacting trees in a near level attitude. On-scene evidence shows power was being produced from both engines upon impact. Post-impact fire consumed the wreckage. Both occupants were killed.

At 1708:48, while cruising at 6,000 feet, a pilot of N711Y advised ATC, 'I think I'd like to turn around, head for Texarkana here, I've got a little problem.' He was provided a vector and advised of closest airports. Shortly after, he stated he would be unable to reach the airports. At 1711:49, he said there was smoke in the cockpit. While landing in a field at 1714, the aircraft hit wires and a pole then continued into trees where it was extensively damaged by impact and fire. The crew egressed thru the cockpit windows. The passengers did not escape. During flight, the crew was unable to start the cabin heater; despite repeated attempts by the captain. Smoke then entered the cabin. Fresh air vents and cockpit windows were opened, but smoke became dense. The crew had difficulty seeing. The oxygen system and hand held fire extinguishers were not used. Fasteners for the heater door were found unfastened. Examination indicated the fire originated in the aft cabin area, right hand side, at or near the floor line. The ignition and fuel sources were not determined. Among those killed were the American singer and actor Ricky Nelson and his girlfriend Helen Blair as well as five members of his band 'Stone Canyon'.

During initial climb after takeoff the pilot noticed oil streaming out from the oil filler access door on the right engine cowling. He elected to continue climbing and make a teardrop turn back to the airport and land in the opposite direction from which he had departed. He announced his intentions on unicom radio. Another pilot responded that he was presently on the runway but would clear it as soon as possible. The subject pilot then decided to make a go around. During this time the right front seat passenger stated he observed flames in the right engine cowl. The pilot shut down the engine and feathered the propeller. He added full power to the left engine and retracted the landing gear and flaps. He was unable to maintain altitude and decided to make a forced landing straight ahead in an open field. He had to pull up once to avoid a power line and maneuver to avoid an antenna. He made a successful forced landing and all occupants exited. The flames quickly spread and the aircraft was consumed by ground fire.

During arrival, the pilot reported a problem with his #1 nav, but said he would try to make an ILS approach. He said he would return to Pontiac, if his ILS did not work. ARTCC cleared him for the ILS runway 32 approach and instructed him to contact Pellston radio (FSS). At 1525, he called the FSS and reported he was 20 miles south. At approximately 1534, the FSS specialist heard an aircraft fly over, but did not know if it was N24RT. He asked the pilot if he was making a missed approach. The pilot gave a negative reply and reported he was picking up the glide slope, then said he was having trouble with his #1 nav. A witness about 6 miles north and west of the airport saw the aircraft on a northerly heading at about 200 feet agl. About one minute later, the aircraft collided with trees, crashed and burned approximately 8 miles from the airport at an approximately elevation of 900 feet. The airport elevation was 720 feet. The nav equipment was too badly damaged during the accident to be tested. According to the aircraft radio log, the last VOR check was on 9/10/83. The pilot had logged 5.4 hours of instrument time during the previous 6 months, but had not logged any approaches. All five occupants were killed.

The aircraft impacted trees during a VOR approach and descended to ground impact. The pilot flew the approach with the autopilot coupled. The altitude hold and alert were set for the MDA. When visual contact with the airport environment was established, the pilot disconnected the altitude hold and began lowering full flaps. At this time the electric trim pitched the nose of the aircraft down and the aircraft impacted trees. Both occupants escaped unhurt.

The aircraft rolled to the right and crashed after a catastrophic (uncontained) failure of the right engine during takeoff for a night flight. The right engine fan rotor disc separated from the hub which damaged the cowling and some disc fragments buried in the fuselage but without damage to the flight controls. The drag created by the loss of thrust and the distorted cowling led to yaw and roll with loss of control of the aircraft. The fan failure propagated from a low grade fatigue crack on the high time fan which was not detected by the visual inspection procedures existing at the time. The manufacturer has since improved the manufacturing and inspection techniques. An AD 86-04-02 was issued on 2/14/86 which deals with fan removal from service according to an operating cycle schedule.

The aircraft was on climbout on an IFR flight plan in VMC conditions when the engine failed. A restart was attempted and the engine ran for a minute or less. Subsequent attempts were unsuccessful. The aircraft was over Lake Michigan and had insufficient altitude to reach the shoreline. A successful water landing was made and the occupants were picked up by the Coast Guard unharmed. Subsequent examination of the engine revealed that the crankshaft had fractured.

During IFR flight at 12,000 feet both aircraft vacuum pumps failed. Aircraft descended in right turn off radar. Witnesses observed aircraft at low altitude above trees, circle, make steep left turn, climb and descend to ground. The pilot, sole on board, was killed.

The aircraft had just successfully completed a series of practice approaches to a full stop. The training flight was being conducted to give refresher training to the pilot who had not flown a Lear Jet in over a year and had never flown a lear model 35. The flight instructor requested a practice approach with a missed approach and was cleared for the option. Witnesses stated that the aircraft rolled right and then rolled left to an inverted position. Colliding with the ground shortly thereafter. All three occupants were killed.