What happened
The pilot of N1946M contacted Anchorage International Airport tower to request landing instructions for the nearby Lake Hood Strip. At the time, Anchorage tower was managing traffic at both the Lake Hood Strip and the adjacent Lake Hood Seaplane Base, as well as at the international airport. Wind conditions at Lake Hood had been variable; just before the pilot requested instructions, the wind was from 300 degrees at 8 knots. The controller advised the pilot to plan for a landing on Runway 31.
As the aircraft approached for landing, the controller provided wind information only when requested by pilots or when the wind shifted. The pilot of N1946M did not request this information. However, at 1657:55, the controller made a broadcast to all aircraft stating that Lake Hood ATIS Information Delta was current and that the wind had shifted to 130 degrees at 9 knots. Approximately 50 seconds later, the controller cleared N1946M to land on Runway 31.
The aircraft was high on final approach. It touched down approximately halfway down the 2,200-foot gravel strip. The pilot was unable to stop within the remaining runway area. The aircraft continued off the end of the runway and nosed over on soft, wet terrain. The pilot later reported that he was not aware there was a tailwind until after the mishap.
The investigation
The investigation focused on the sequence of events leading to the runway overrun. Key findings included the variable wind conditions and the controller's protocol for disseminating wind updates. The pilot admitted to not requesting wind information, relying instead on the general broadcast which he did not realize indicated a tailwind for his specific approach path.
Findings
Contributing factors included the variable wind conditions and the pilot's failure to actively request current wind data before landing. The sudden shift from a headwind component to a tailwind, combined with being high on final approach, resulted in excessive ground speed at touchdown. The insufficient runway length available for stopping on the gravel surface exacerbated the outcome.
Safety message
Pilots operating in environments with variable wind conditions should actively request current wind information from air traffic control rather than relying solely on automated broadcasts or general updates. Understanding the direction of the wind relative to the runway is critical for calculating landing performance and ensuring safe stopping distance.