No fatalities

14 Jul 2013: BOEING E75 — Bozeman, MT

Bozeman, MT, United States

On 14 Jul 2013, a BOEING E75 was involved in an aviation accident near Bozeman, MT. No fatalities were reported. Investigators recorded the probable cause as: The pilot’s failure to maintain adequate airspeed during a turn, which resulted in a loss of lift and collision with terrain. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards

During initial climb from a turf runway, the pilot noted degraded climb performance attributed to passenger weight. At 200 ft AGL, he initiated a 180° turn to avoid obstacles and populated areas, but the airplane lost altitude despite adequate power and airspeed. Increasing bank angle failed to prevent collision with terrain near the airport perimeter fence.

Accident Narrative

The pilot reported that he and a pilot-rated passenger departed from a turf runway in calm wind conditions. During the initial climb, the airplane’s climb rate was not as expected, and the pilot attributed this degraded performance to the likely result of the addition of the passenger’s weight.

Upon reaching 200 feet above ground level (agl), the pilot began a 180-degree turn to the north in an effort to gain altitude while avoiding maneuvering over obstacles and a more densely populated area.

As the airplane entered the bank, the pilot felt a degradation in performance despite indications that both the engine power and airspeed were adequate. The airplane was not maintaining altitude, and in an effort to avoid colliding into a subdivision, the pilot increased the bank angle. The airplane subsequently collided into terrain and came to rest in a ditch adjacent to the airport’s perimeter fence.

Damage and Post-Accident Comments

During the accident sequence, the airplane sustained damage to the wings and empennage.

The pilot further stated that he believed the airplane’s descent during the turn was a result of either of the following: a downdraft, too high angle-of-attack attitude, or possible decrease in engine power output. He reported no mechanical malfunctions or failures with the airplane that would have precluded normal operation.

The passenger opined that the accident was a result of the airspeed being too slow for the steep bank angle.

Contributing factors

Airspeed — Not attained/maintainedAngle of attack — Not attained/maintainedPilot