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Atlas / NTSB / WPR14CA292

NTSB CAROL · Event

Event WPR14CA292

2014-07-13 Truckee, California, United States Airport · TRK Serious 1 aircraft Status: Completed

Registry · N501WG

FAA Aircraft Registry record.

Make / Model

JONKER SAILPLANES (PTY) LTD JS1-C

Year of manufacture

2015

Engine

AMA/EXPR UNKNOWN ENG

Seats / Engines

1 seats · 1 engine

Last airworthiness date

20150531

ADS-B equipped

Yes — Mode-S A63FA2

Registrant of record

MOCKLER DANIEL J

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's failure to maintain aircraft control in gusting wind conditions while on final approach to the runway.

Factual narrative

The pilot reported that following an uneventful flight, he checked the weather at his destination airport, noting wind was from 220 degrees at 7 knots, gusting to 16 knots. The pilot initiated an approach to landing on runway 20, however, while on final approach, the glider began to descend rapidly and roll to the left. The pilot applied opposite control inputs and noted that the glider began to turn to the right prior to impacting terrain slightly downslope from the runway. Recorded weather observations at the airport about 23 minutes after the accident revealed that the wind was from 250 degrees at 11 knots, gusting to 18 knots. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot reported that following an uneventful flight, he checked the weather at his destination airport, noting wind was from 220 degrees at 7 knots, gusting to 16 knots. The pilot initiated an approach to landing on runway 20, however, while on final approach, the glider began to descend rapidly and roll to the left. The pilot applied opposite control inputs and noted that the glider began to turn to the right prior to impacting terrain slightly downslope from the runway. Recorded weather observations at the airport about 23 minutes after the accident revealed that the wind was from 250 degrees at 11 knots, gusting to 18 knots. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • Environmental issues-Conditions/weather/phenomena-Wind-Gusts-Effect on operation
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Altitude-Not attained/maintained - C

Verbatim from NTSB's published report. Source file NTSB_2014_WPR14CA292.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.