Columbia-Mount Pleasant-Maury County

The pilot had computed landing performance information for a landing on a wet runway with anti-skid; sufficient runway surface was available. Touchdown was normal, however during the braking process, the airplane started to fishtail and the pilot believed that the anti-skid system had failed. Therefore, the pilot turned the antiskid system off and continued the rollout with normal braking. The airplane went off the departure end of runway 05 and sustained substantial damage. Performance data indicated more runway surface was required for a safe landing on a wet runway without anti-skid assistance. The braking sequence of events described by the pilot resembled dynamic hydroplaning where there was a complete loss of braking effectiveness rather than an anti-skid malfunction. An examination of the airplane failed to disclose any mechanical problems.

After conducting ground training all day, the instructor/director of operations and his trainee flew an EMB-110P1 to Memphis to exchange airplanes. Ground fog had started to form prior to departure. After exchanging airplanes, they made the return flight to Columbia. They obtained radar vectors to the final approach course for the SDF at Columbia. The thick fog resulted in a missed approach. During the missed approach, the runway was visible from above and the crew indicated that they would try for a VFR approach and landing. The airplane collided with trees 2,350 feet from the runway in a wings level attitude. The tops of the trees were broken 41 feet above the runway threshold altitude. The trainee had been without rest for at least 30 hours prior to the accident. One pilot was killed while the second was seriously injured.