Thursday, October 13, 2016

Luscombe 8B, N39083: Accident occurred October 12, 2016 at Huntingburg Airport (KHNB), Holland, Cass Township, Dubois County, Indiana

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Indianapolis, Indiana

Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Investigation Docket - National Transportation Safety Board: https://dms.ntsb.gov/pubdms

http://registry.faa.gov/N39083

NTSB Identification: GAA17CA021
14 CFR Part 91: General Aviation
Accident occurred Wednesday, October 12, 2016 in Huntingburg, IN
Aircraft: LUSCOMBE 8, registration: N39083
Injuries: 1 Minor.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

According to the pilot in the tailwheel-equipped airplane, after an hour long local flight, he returned to the airport from which he had departed, and noticed that he would be landing with a gusting, direct left crosswind. He made one low pass about 20 ft. above the ground, and "I felt the airplane was steady". He accomplished a go-around and initiated an approach. He recalled that he made a three-point landing and touched down about 50 miles per hour on the runway centerline. When the wheels touched down a gust of wind lifted the left wing, and he tried to compensate with aileron and throttle, but reported that he "was too slow to regain control of the airplane". He reported that the left wing struck the ground, the airplane exited the left side of the runway and nosed over. The airplane sustained substantial damage to both wings and the fire wall.

The meteorological aerodrome report at the airport, at the time of the accident, was wind 180°, at 11 kts., gusting to 16 kts. The airplane landed on runway 27.

According to the FAA-H-8083-3B Airplane Flying Handbook, specifically the section entitled Crosswind After-Landing Roll, pg. 8-15 and 8-16:

Retaining control on the ground is a critical part of the after-landing roll, because of the weathervaning effect of the wind on the airplane. 

While the airplane is decelerating during the after-landing roll, more and more aileron is applied to keep the upwind wing from rising. Since the airplane is slowing down, there is less airflow around the ailerons and they become less effective. At the same time, the relative wind is becoming more of a crosswind and exerting a greater lifting force on the upwind wing.

When the airplane is coming to a stop, the aileron control must be held fully toward the wind.

The pilot reported that there were no pre-accident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

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