United States of America

The aircraft was engaged in a local training flight at Maxwell AFB, carrying three pilots. At liftoff, it went out of control and crashed near the runway. Two occupants were killed and a third pilot was injured.

The flight crew failed to adhere to appropriate procedures and directives when they failed to select the hp cock levers to the hswl (lock out) position while performing an approach to landing stall during a training/test flight. When stall recovery was initiated, both propellers 'hung up' when the high (cruise pitch) stops of each propeller failed to withdraw. As the power levers were advanced, turbine gas temperatures (tgt's) exceeded limitations; the left propeller auto-feathered, the right propeller was later feathered by the captain. Restart procedures were attempted without success, and a forced landing in a plowed cornfield ensued. Examination of the engines revealed that the turbines had been 'subjected to severe (and destructive) thermal degradation during operation' as a result of the propellers being constrained during low speed operations. Testing of the relays revealed that the high stop withdrawal relay for the right propeller functioned intermittently. All three crew members escaped uninjured.

The pilot of the nonscheduled domestic passenger air taxi flight was flying the VOR/DME runway 22 approach to Wiley Field, Miles City, MT. The pilot said he turned on the autopilot and after turning inbound from the procedure turn towards the faf he engaged the approach mode. After crossing the faf the pilot descended to MDA and engaged the altitude hold mode. When he reached the map the pilot started to make a missed approach but a passenger, seated next to him in the copilot's seat, reported the runway in sight. The pilot said he saw the runway and retarded the throttles in order to descend for landing. The aircraft nose pitched up abruptly, the aircraft stalled, and mushed to the ground. The aircraft hit hard and skidded off the runway. Two occupants were injured and four others escaped uninjured.

The aircraft was enroute to the Chicago Midway Airport. While letting down to 16,000 feet the pilot reported he was shutting down the right engine. ARTCC cleared the aircraft to 5,000 feet. Ten minutes later ARTCC lost radio transponder and mode C contact. 15 minutes later the aircraft descended out of the 1,800 feet overcast and struck a 170 feet utility tower at the 150 feet level. The aircraft then ground impacted and burned. Investigation revealed that the right engine had a bearing failure due to lack of lubrication. The pilot, sole on board, was killed.

The pilot stated that this was not a charter flight and, as such, he decided to attempt the loc 17 approach to Olathe even though the area was forecasting zero-zero conditions. According to the pilot, the last thing he remembers during the flight is bracketing the loc and reading 1,600 feet on the altimeter. Subsequently, the pilot further stated, he remembers being on the ground inside the wreckage, mitigating the injuries suffered and trying to stay warm. A post-accident invest revealed that the aircraft was to the left of the localizer course when it struck two trees 12 feet agl (1,062 feet msl), while in a 30° right bank. The aircraft made a flat 360 right pirouette over some small trees, tearing off the left wing before impacting the ground and sliding approximately 600 feet. A post-crash fire erupted from the right wing tank but it extinguished itself. A dot FAA operational flight test found the localizer to be within limits. A leak check of the aircraft static system and a bench check of both altimeters were satisfactory.

The pilot took off in fog and light rain and climbed into clouds at about 300-400 feet above the ground while both landing lights were extended and illuminated. Also the airport's rotating beacon (located about a mile from the accident site) was flashing on the clouds according to a ground witness. Just after entering the clouds the pilot was issued a left turn from his present heading of 350° to a heading of 270° and told to contact departure control. He did not make this contact and he continued the left turn (now descending) to a heading of 210° at which time the aircraft collided with trees and a large electrical transmission line and then the ground. The engines were operating at a high power setting at the time of impact. All broken flight control cables revealed evidence of overstress separation. No evidence of preimpact mechanical failure or malfunction was found. The pilot, sole on board, was killed.

The pilot was on the fourth leg of a night cargo flight cruising at approximately 500 feet agl enroute to Mt Vernon, IL, when the aircraft struck some trees and subsequently collided with the ground. The engines and propellers were both torn down and tested and no evidence of malfunction was discovered. The pilot stated he did not recall the crash sequence at all. The pilot was wearing a 'walkman' radio at the time of the accident. He stated it was to help keep him awake, because he had fallen asleep at times in the past while flying night cargo.

During arrival for a LOC runway 26 approach, the pilot was advised the abyss fan marker was notamed out-of-service. With abyss inoperative, the minimum descent altitude (MDA) was 2200 feet. After N65TD was cleared for the approach, radar service was terminated and the flight was cleared to advisory frequency. The crew contacted unicom and obtained airport and weather advisory. The Unicom operator advised winds light and variable, estimated 800 feet overcast, visibility 5 miles, slush and ice reported on runway 1/2 hr earlier. After the crew reported 'procedure turn inbound,' no further transmissions were received from the aircraft. Subsequently, it hit trees on rising terrain at an elevation of approx 2200 feet, approx 7 miles before reaching the final approach fix (FAF, DALTON NDB). Minimum altitude for the approach in that area was 3000 feet. No preimpact part problems were found during the investigation. Airport elevation was 1194 feet. Radio transcripts indicated the crew were getting a weak signal from the DALTON NDB. Although not a required navaid, CHESTER VORTAC was depicted on the approach chart as an additional source to id the FAF, but was notamed as out-of-svc. The pilot did not obtain notams before flight.

During the transition from a DME arc to the ILS final approach course, the pilot allowed the aircraft to prematurely descend into the ground. The reason for the descent could not be determined. However, no preimpact mechanical malfunction with the aircraft was found nor was there any evidence supporting pilot incapacitation. Dark night conditions in fog and low ceilings prevailed during the approach. All three occupants were injured, two seriously.

Reason for the Cessna to veer in a semi-circle and collide with another aircraft is undetermined. Examination of the start lock assemblies could not be completed due to the extensive impact and fire damage. The aircraft was being prepared for a flight. During a manual speed governor check on the left engine the aircraft veered in a semi-circle. An attempt to examine the aircraft start locks was negated by the fire damage from the collision. Both occupants escaped uninjured.