On August 31, 1984, a Maule M-6-235 (registration N5651D) was involved in an aviation accident near Bettles, AK. Investigators recorded the probable cause as: The pilot's failure to maintain adequate control during a river takeoff due to limited experience with the aircraft model, resulting in a collision with an overhanging tree branch. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A float-equipped aircraft struck an overhanging tree branch while attempting a river takeoff. The pilot, citing limited experience with the specific model, lost control during a turn.
What happened
The aircraft was engaged in a takeoff operation from a river when it collided with an overhanging tree branch. The pilot reported that he was attempting to navigate a bend in the river while maintaining the 'step' position for takeoff. During this maneuver, the aircraft became airborne prematurely, causing the floats to lift and skip within the turn. The pilot noted that the aircraft responded more quickly than he was accustomed to handling.
The investigation
Post-accident examination confirmed the collision with the vegetation. The mechanical integrity of the airframe was consistent with the described impact sequence. No pre-existing mechanical failures were identified as contributing factors.
Findings
The primary factor in this accident was the pilot's lack of proficiency with the specific aircraft model. The pilot stated he had very limited experience flying this type of aircraft. This inexperience contributed to his inability to manage the float dynamics during the river takeoff and turn. The decision to attempt a complex maneuver without adequate familiarity with the aircraft's handling characteristics played a significant role in the outcome.
Safety message
Pilots operating float-equipped aircraft in confined or obstructed environments must ensure they have sufficient experience with the specific model before attempting complex maneuvers. Understanding the unique handling qualities of different aircraft types is critical for safe operation near obstacles.
Probable cause
The pilot's failure to maintain adequate control during a river takeoff due to limited experience with the aircraft model, resulting in a collision with an overhanging tree branch.