Approach and Touchdown
The aircraft was conducting an ILS approach to runway 24, which is 6400 feet long. Visual contact with the runway was established at approximately 500 feet AGL, at which point the aircraft was indicating one dot high on the glide slope. Witnesses reported that the aircraft touched down past the halfway point on the runway with full flaps in moderate rain. At the time, a 5-knot tailwind was present, and the runway had a 0.8% downslope.
Braking and Evasive Action
Upon application of the brakes, the pilot found them ineffective and called for flaps up. Braking remained ineffective, and the pilot elected to ground loop the aircraft to stop. Left-turning skid marks were found starting 300 feet before the end of the runway. The skid marks continued 120 feet beyond the runway until the aircraft traveled off an embankment. Approximately 3 inches of water was present on the runway when the accident occurred.
Collision
The aircraft traveled 120 feet beyond the embankment and collided with upsloping terrain on the other side.