What happened
During the first flight of the day, an aircraft carrying a load of superphosphate attempted a takeoff from the Seaview runway strip. During the maneuver, the aircraft was unable to clear a stand of trees located downslope from the lift-off point. Evidence suggests the pilot may have attempted to jettison the hopper contents shortly after becoming airborne to reduce weight, as superphosphate pellets were found scattered between the takeoff point and the impact site. However, the reduction in weight was likely insufficient to provide the necessary clearance. The aircraft ultimately struck the trees approximately 16 feet from their tops and collided with the terrain.
The investigation
Investigators examined the aircraft's weight and performance capabilities, noting that the aircraft was likely operating at a weight that exceeded both the documented maximum takeoff weight and the performance-limited maximum takeoff weight for that specific strip. While no mechanical defects were found in the engine, and the propeller was rotating under power at impact, analysis of video recordings and tachometer marks suggested engine power may have been slightly lower than normal. Potential factors for reduced power, such as carburetor ice or the carburetor heat selector being left on, could not be confirmed due to insufficient evidence. Additionally, while the pilot had used this strip previously, the growth of trees at the northern end of the runway had reduced the available safety margins.
Findings
- The aircraft was likely operating at a weight that exceeded the maximum takeoff weight and the performance limits of the runway strip.
- The increased height of trees at the northern end of the strip reduced the margin for error during takeoff.
- The pilot's attempt to jettison the superphosphate load occurred too late to effectively alter the aircraft's flight path.
- The investigation could not determine why the pilot chose a takeoff orientation facing the trees when an alternative option was available.