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WPR12CA157

2012-04-06 · Nampa, Idaho, United States · None · 1 aircraft · Status: Completed

Airport MAN

N990 has since been reassigned. It is now registered to a different aircraft (CIRRUS DESIGN SR22T, built 2025), which was not involved in this event.

Aircraft involved

Probable cause & findings

The pilot’s incorrect positioning of the wing flaps during the landing approach, which resulted in a loss of lift and hard landing.

Factual narrative

The pilot reported that after soaring for nearly 3 hours, he returned to the departure airport and made a traffic pattern approach for landing. On final approach, he lowered the wing flaps to 40 degrees. The pilot additionally reported that, because it appeared he was going to be too high, he further extended the wing flaps. Suddenly, the glider’s sink rate increased, and the glider touched down hard short of the runway. The glider bounced, yawed sideways, the landing gear collapsed, and the fuselage buckled as the glider slid to a stop. The pilot stated that he subsequently observed that the flaps were set to 90 degrees, which was 30 degrees farther down than he had intended. The pilot reported that, after soaring for nearly 3 hours, he returned to the departure airport and made a traffic pattern approach for landing. On final approach, he lowered the wing flaps to 40 degrees. The pilot additionally reported that, because it appeared the glider was going to be too high, he further extended the wing flaps. Suddenly, the glider’s sink rate increased, and the glider touched down hard short of the runway. The glider bounced and yawed sideways, the landing gear collapsed, and the fuselage buckled as the glider slid to a stop. The pilot stated that he subsequently observed that the flaps were set to 90 degrees, which was 30 degrees beyond what he had intended. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • — Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Descent/approach/glide path-Not attained/maintained
  • C Aircraft-Aircraft systems-Flight control system-TE flap control system-Incorrect use/operation - C
  • C Personnel issues-Task performance-Use of equip/info-Use of equip/system-Pilot - C

Verbatim from NTSB's published report. Source file NTSB_2012_WPR12CA157.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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