FlightFinder
Check my flight
Casualties unknown

Aircraft Settles on Runway After Cabin Window Opens During Climb (N18307)

Belgrade, MT, US

On August 12, 1991, a Beech V35B (registration N18307) operated by Mm&o Aviation, Inc. was involved in an aviation accident near Belgrade, MT. Investigators recorded the probable cause as: The pilot's failure to maintain positive climb rate following a cabin window opening, which diverted his attention from aircraft control. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-19Data APIEditorial standards

Following takeoff, a cabin window opened, diverting the pilot's attention. The aircraft failed to maintain climb rate and settled back onto the runway without further incident.

What happened

Immediately after gear retraction during the initial climb phase of takeoff, the right center cabin window unexpectedly opened. The sudden increase in ambient noise diverted the pilot's attention away from flight instruments to his daughter, who was seated adjacent to the affected window. While attempting to secure the window, the pilot failed to maintain a positive climb rate. Consequently, the aircraft settled back onto the runway surface.

Findings

The primary factor contributing to the incident was the pilot's loss of situational awareness regarding altitude due to distraction caused by the open window and passenger reaction.

Probable cause

The pilot's failure to maintain positive climb rate following a cabin window opening, which diverted his attention from aircraft control.

Frequently asked questions

What happened in the 12 Aug 1991 Beech V35B accident near Belgrade, MT?

Following takeoff, a cabin window opened, diverting the pilot's attention. The aircraft failed to maintain climb rate and settled back onto the runway without further incident.

What aircraft was involved and where did it happen?

The accident on 12 Aug 1991 involved a Beech V35B, registration N18307, operated by Mm&o Aviation, Inc., at Belgrade, MT.

What was the probable cause of the accident?

The pilot's failure to maintain positive climb rate following a cabin window opening, which diverted his attention from aircraft control.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X17984. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.