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ERA13CA310

2013-04-12 · Tullahoma, Tennessee, United States · None · 1 aircraft · Status: Completed

Airport THA

Aircraft involved

Probable cause & findings

The pilot's improper use of wing spoilers during approach resulting in an altitude loss and collision with a tree.

Factual narrative

According to the pilot, he was on a one mile final approach to runway 36 at 800 feet with the glider engine stowed. He noted that the winds were changing and extended the flaps. The airspeed was between 55 and 60 knots when the airbrakes were extended to start a descent. The altitude was high and the glider began to descend at a rapid rate. The pilot closed the airbrakes to arrest the descent rate but realized he was too low and unable to land on the intended runway. The glider collided with a tree, and a post-accident examination revealed that the left wing was substantially damaged. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. According to the pilot, he was on a one mile final approach to runway 36 at 800 feet with the glider engine stowed. He noted that the wind was changing and extended the flaps. The airspeed was between 55 and 60 knots when the airbrakes were extended to start a descent. The altitude was high and the glider began to descend at a rapid rate. The pilot closed the airbrakes to arrest the descent rate but realized he was to low and unable to land on the intended runway. The glider collided with a tree, and a post-accident examination revealed that the left wing was substantially damaged. The pilot reported no pre-impact mechanical malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Aircraft-Aircraft systems-Flight control system-Drag control system-Incorrect use/operation - C
  • C Personnel issues-Action/decision-Action-Incorrect action performance-Pilot - C
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Altitude-Not attained/maintained - C

Verbatim from NTSB's published report. Source file NTSB_2013_ERA13CA310.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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