United States of America

The aircraft was operating as Continental Express flight 2286. During the approach in IFR conditions, the aircraft went below the minimum descent altitude then struck the terrain at 7,180 feet msl. Examination of the aircraft did not disclose any pre-impact failures or system malfunctions. The evidence indicated that the copilot was flying the airplane during the approach. Evaluation of the radar data showed an excessive rate of descent before the collision with terrain. Postmortem toxicological examination showed that the captain had used cocaine prior to this flight. The safety board concluded that this use had adversely affected his ability to monitor the unstabilized approach flown by the copilot. Records of both crewmembers revealed prior traffic violations and accidents, and, in the case of the captain, a previous aircraft accident. Evaluation of the weather conditions indicated that a 10 to 15 knot tailwind condition existed throughout the approach.

During the final approach on the instrument landing system, the pilot descended below the glidepath. The aircraft collided with a tree and struck the ground short of the runway threshold. The pilot was seriously injured.

The passenger said that the approach appeared normal until the pilot turned on the landing lights while in the overcast. Seconds after, the aircraft impacted trees, careening out of control, and snapping power lines; then striking a house roof before coming to rest on the ground. The airplane began to burn as it went through the power lines. The weather at the time was at or above IFR landing minimums. The flight had been in a holding pattern for forty five minutes prior to commencing the approach. All of the aircraft's systems and powerplants, as well as the FAA approach facilities, were determined to be in working order. The pilot was killed and all three passengers were seriously injured.

Before takeoff, a pilot of XA-KUT was briefed that the Houston Hobby (HOU) weather was IFR with '. . . Indefinite ceiling zero sky obscured visibility's 1/16 of a mile and fog . . .' He was also advised IFR conditions were forecast until 0900 cst, gradually improving to marginal VFR by 1100 cst with 1,000 feet broken, 5 miles visibility and fog. The flight took off at 0900 cst. At HOU, arrival was delayed due to weather. The crew requested an ILS approach, with intentions of diverting if a missed approach was made. The RVR was variable. After being cleared for an ILS runway 04 approach, the pilot was advised the RVR had dropped to 1,400 feet. After changing to tower frequency, the flight was cleared to land and was told again the RVR was 1,400 feet. When the aircraft was on final approach, the pilots were advised of a low altitude alert. However, the aircraft continued below the decision height (dh), hit a 70 feet power line (approximately 6,500 feet short of the runway) and crashed. No preimpact malfunction of the aircraft or its systems was found. The ILS was flight checked, but only a minor discrepancy (concerning the outer marker width) was noted. The dh was 200 feet agl, minimum RVR for the approach was 2,400 feet. The copilot was killed and seven other occupants were injured, three seriously.

The pilot obtained two weather briefings and filed an IFR flight plan to El Paso, TX. He was not instrument rated. The aircraft departed Englewood at 1959 and disappeared from radar at 2010. The crash site was 11- 1/2 miles southeast of the Kiowa vortac and 36 miles southeast of Englewood. Radar showed a 15-miles wide band of snow showers southeast of the Kiowa vortac. Ground witnesses reported blizzard conditions. Pilot medical certificate stated, 'not valid for night flight or by color control.' Pilot autopsy also disclosed 'myxomatous alteration of the mitral valve, consistent with mitral valve prolapse (floppy mitral valve).' Both occupants were killed.

Aircraft was scheduled for an instructional flight. During the weather briefing, the CFI told the FSS specialist that the flight would include engine out practice. Witness statements indicate that the aircraft rolled sharply to the right and nosed down after attaining about 100 feet of altitude during the climb after takeoff. The aircraft struck the ground left prop and left wing tip first, in an inverted flight attitude. During the post accident investigation, the right engine power lever was subjected to lab exam and it was found that the lower aft part of the lift gate detent was worn. This created a ramping effect between the rounded edge of the lift gate and the flight idle stop. A worn lift gate detent would allow the power lever to inadvertently be moved into the beta range, causing asymmetrical drag and degraded airplane performance, particularly in critical phases of flight. All three occupants were killed.

The crew was executing the ILS approach and had turned back inbound on the procedure turn to the outer marker when the copilot stated they were 5.9 DME in a calm voice with no indication of a problem. Impact with the ground occurred at about 5.9 DME, approximately 10 statute miles from the airport, while the aircraft was in a slight nose up, slight right wing down attitude, with a high vertical rate of descent, and a high forward speed. The aircraft was demolished. No evidence of a pre-impact failure or malfunction of the aircraft or its systems could be found. The copilot was not rated in the aircraft and had logged a total of 7.9 hours of jet time in his personal logbook.

The aircraft collided with power lines and the ground shortly after takeoff during instrument conditions. The only evidence of a malfunction or failure which was found was the gyro for the pilot's attitude indicator which had no indication of rotation at impact. The previous pilot stated that he normally pulled the ac circuit breaker after landing, that the breaker supplied voltage to the pilot's attitude indicator, and that he told the new pilot of this procedure which was not on the aircraft's checklist. This was the new pilot's first instrument flight in this aircraft. The accident occurred in a residential area.

During a visual approach, the pilot said he encountered 2,000 fpm downdrafts. The pilot stated he added power and executed a normal approach at 120 knots, compensating for downdrafts/crosswinds. After touchdown, the pilot said he did not get a beta light on the right engine. He stated he brought the power levers 'behind the gate into reverse.' The aircraft drifted left. The pilot said he corrected with brakes and nosewheel steering. He applied takeoff power and the aircraft veered right, and ran off the right side of the runway. The aircraft collided with a dirt bank and then trees. Three tire skid marks were observed on the right side of the runway. A pilot-witness said winds were gusting 22-25 knots, variable from 130-220°. He said the aircraft landed fast and long. Examination of the engines and props revealed no evidence of malfunction. The engine manufacturer recommends prop reverse not be used on icy runway or when beta light on one engine does not illuminate. The aircraft manufacturer advises that nosewheel steering should not be used at speeds below 40 knots. All six occupants were injured, two seriously.

Eastern flight 573 contacted approach control at 2323 cst, was advised to expect an ILS runway 16 approach and was vectored around weather. At 2330, the controller advised the ILS glide slope (g/s) had gone into 'alarm' but the loc appeared normal. At 2333, the wind shifted to 310° at 7 knots. Since the bc approach to runway 34 was notamed as inop, the crew continued to runway 16, using 50° of flaps. At 2334, they told the controller, 'if you don't get the g/s up, we'll do a... loc approach.' They reported receiving the g/s, but were advised the g/s was still in alarm. The aircraft broke out of clouds in rain at 900 feet; light turbulence was encountered on final approach. At about 1 mile out, the f/o noted the aircraft was high and advised the captain. The captain pushed the nose over and reduced power, increasing speed and rate of descent. Requested altitude callouts were not made. F/O advised captain to flare, but flare was inadequate. The aircraft touched down hard and the fuselage failed between stations 813 and 756. Aircraft was stopped with the tail resting on the runway. Four passengers received minor injuries during evacuation. Weather study showed a moderate to strong (vip level 2 to 3) weather echo over the approach end of runway 16.