NTSB Identification: SEA91LA206.
The docket is stored on NTSB microfiche number 43940.
Accident occurred Sunday, August 11, 1991 in BELGRADE, MT
Probable Cause Approval Date: 03/09/1993
Aircraft: BEECH V35B, registration: N18307
Injuries: 4 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

IMMEDIATELY FOLLOWING GEAR RETRACTION ON TAKEOFF THE RIGHT CENTER CABIN WINDOW OPENED. THE PILOT'S ATTENTION WAS DIVERTED BY THE AMBIENT NOISE AND ITS EFFECT ON HIS DAUGHTER WHO WAS SEATED ADJACENT TO THE WINDOW. THE PILOT THEN TURNED HIS ATTENTION TO SECURING THE WINDOW AND DURING THIS EVENT FAILED TO MAINTAIN A POSITIVE CLIMB RATE. THE AIRCRAFT THEN SETTLED BACK TO THE RUNWAY.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE PILOT'S FAILURE TO MAINTAIN A POSITIVE RATE OF CLIMB DURING THE TAKEOFF. FACTORS CONTRIBUTING TO THE ACCIDENT WERE THE OPEN CABIN WINDOW AND THE PILOT'S DIVERTING HIS ATTENTION.

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