LAX86LA296

NTSB accident investigation · Glasflugel ST Libelle · Vacaville, CA · July 20, 1986

Accident · Serious injuriesLimited investigationFinal report
Date
July 20, 1986, 13:33 local (20:33 UTC)
Place
Vacaville, CA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N74162Glasflugel ST Libelle
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860720075449A
Case key
25216

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

UndershootApproach
In-flight planning/decision - poorPilot in commandCause
Proper glidepath - not maintainedPilot in commandCause
Loss of control - in flightApproach
Pull-up - excessivePilot in commandCause
Stall/spin - inadvertentPilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

According to witnesses the sailplane was too low on the landing appraoch and in an attempt to stretch the glide the pilot stalled the sailplane and entered a spin prior to contact with the ground.

Aircraft

Registration
N74162
Reported as
Glasflugel ST Libelle
Category
Glider
Serial number
420
Airframe hours
560
Engine
unknown
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Richard R. Wythe
Airworthiness certificate
Standard, Normal
Airport
Vacaville Gliderport

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
40
Certificate
Private
Airplane ratings
Single-engine land
Seat
Center
Flight hours
770 total

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 9 knots
Visibility
30 statute miles
Lowest ceiling
None
Temperature
95 °F, dew point 54 °F
Altimeter
29.00 inHg
Observed at
SUU, 6 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.