Iowa

N81589 was following a Boeing 727 on ILS approach in IFR conditions. Approximately 2.5 miles from runway, N81589 suddenly deviated left nearly 90°. 39 seconds later, pilot reported he encountered severe turbulences, then said he was trying to climb. N81589 subsequently flew thru tree tops on rising terrain for approximately 2 city blocks, then hit power lines and a pole and crashed against a tree. No evidence of turbulences due to weather at/near approach altitude. Investigation showed 4.7 miles separation between aircraft when the 727 passed the point of deviation (pod). At pod, the 727 was on the ILS glide slope at 850 feet; N81589's altitude was not determined. Wind was from 120° at 3 to 6 knots, shifting more southerly withalt. Prevailing visibility was 1/2 mile; RVR for runway 12L was 6,000 feet; light rime icing was reported. Witnesses heard power interruption of one engine at pod; but there was no indication of power loss where aircraft hit trees. Radar data showed aircraft slowed to 80 knots at pod, accelerated to 100 knots during deviation, slowed to 70 knots before impact; vmca was 74 knots. Safety board believes the pilot most likely lost control due to slow speed and light airframe icing; possibly encountered wake turbulences. No reason found for loss of engine power. All seven occupants were killed.

The aircraft landed in a crosswind on a snow and ice covered runway. During landing, directional control was lost and the aircraft collided with a snowbank. The pilot stated he attempted to use propeller reversing for braking and the aircraft started to slide to the left. All four occupants escaped uninjured while the aircraft was damaged beyond repair.

At 2015 the flight contacted ARTCC and requested Dubuque weather. They were advised that Dubuque was 500 feet indefinite ceiling, sky obscured, visibility 1/2 mi fog and they would be vectored for a back course runway 13 approach. The flight then requested the front course approach to runway 31 and the controller advised the flight that it would be vectored to the ILS front course approach to runway 31. Approximately 40 seconds later the flight advised the controller that it would take the back course approach to runway 13. The landing minima for a straight-in ILS runway 31 is 1/2 mile visibility and for a straight-in LOC/DME back course approach to runway 13 3/4 mile visibility. The aircraft's wreckage was found in a valley about 3/4 mile short of runway 13 and approximately 100 feet below the runway elevation about two days after the crash. Both occupants were killed.

On short final to Spirit Lake-Lake Okoboji Airport, the left engine failed. The airplane lost height and struck the runway surface. Out of control, it veered off runway and collided with a fence, bursting into flames. The aircraft was destroyed and all six occupants were seriously injured.

Few minutes after takeoff from Cedar Rapids, while cruising by night in marginal weather conditions, the single engine airplane entered an uncontrolled descent and crashed. Both occupants were killed.

On final approach to Spirit Lake-Lake Okoboji Municipal Airport, during the last segment, one of the engine failed. The pilot decided to initiate a go-around when the airplane stalled and crashed on a residential building located near the airport, bursting into flames. The aircraft and eight condominiums were destroyed by a post crash fire. While both people on board the airplane were injured, there were no injuries on ground.

During the takeoff roll at Cedar Rapids Airport, the crew lost control of the aircraft that ground looped, swerved and crashed in flames. Both pilots were killed.

On final approach, the crew failed to realize his altitude was too low when the airplane struck an embankment located 300 feet short of runway 03 threshold. Upon impact, the undercarriage were torn off, the airplane nosed down and crashed. Both pilots were injured and the aircraft was damaged beyond repair.

En route from Saint Louis to Minneapolis, while cruising at an altitude of 6,000 feet, the right engine caught fire. The copilot declared an emergency and was cleared to divert to Elma Airport. Shortly later, the right engine detached. The crew completed an emergency descent but made a forced landing off airport on land. All four occupants evacuated safely while the aircraft was considered as damaged beyond repair.

While cruising by night on a cargo flight from Des Moines to Chicago, the pilot encountered engine problems and decided to divert to Muscatine for an emergency landing. Due to lack of visibility, he was unable to locate the runway and completed three low passes then started an approach to runway 12. On final, the airplane struck the ground and crashed about 1,245 feet short of runway. The aircraft was destroyed and the pilot was killed.