SEA84FA172

NTSB accident investigation · Schempp-Hirth Ventus A · Ephrata, WA · July 12, 1984

Accident · FatalField investigationFinal report
Date
July 12, 1984, 14:50 local (21:50 UTC)
Place
Ephrata, WA
Injuries
1 fatal, 1 uninjured
Phase of flight
Maneuvering
Aircraft
N17KSSchempp-Hirth Ventus AN919RSchleicher ASW 20 B
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
39814

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.

Midair collisionManeuvering
Visual lookout - inadequatePilot of other aircraftCause
TotalPilot of other aircraftCause
Remedial action - not performedPilot in commandCause
Midair collisionManeuvering
Visual lookout - inadequatePilot in commandCause
Improper use of procedurePilot in commandFactor
In flight collision with terrain/waterDescent - uncontrolled
Stall

Analysis

A 'gaggle' of about 7 gliders were maneuvering in a climb when N919R climbed into the group. The plt of N17KS said he saw N919R closing and increased his angle of bank to about 100 degrees to try and avoid a collision. The leadingedge of the left wing of N919R contacted the trailing edge of N17KS right wing. N17KS went into a vertical dive but recovered and landed at the airport about 3 miles away. N919R went into an inverted spin and crashed still inverted. No parachute was observed to deploy.

A 'gaggle' of about 7 gliders were maneuvering in a thermal when N919R tried to join the group. Their airspeed was ABOUT55 KTS and his was estimated at about 80 KTS. N919R collided with N17KS and entered an inverted spin from which it did not recover. N17KS made a successful landing without further incident at the arpt of departure.

Aircraft · 2

Registration
N17KS
Reported as
Schempp-Hirth Ventus A
Category
Glider
Serial number
6
Engine
None NONE, unknown
Damage
Minor damage
Flight
Personal · Part 91
Registered owner
Lawrence M. Rogers
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · August 4, 1983
Departed
EPH · Ephrata, WA
Registration
N919R
Reported as
Schleicher ASW 20 B
Category
Glider
Serial number
20621
Engine
None NONE, unknown
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Karl H Striedieck
Airworthiness certificate
Special, Experimental (Special)
Departed
EPH · Ephrata, WA

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N17KS
Age
61
Certificate
Private
Airplane ratings
Single-engine land
Seat
Front
Toxicology
Performed
Flight hours
112 in this make and model
Role
Pilot, aircraft N919R
Age
47
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Front

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 15 knots
Visibility
30 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 39 °F
Altimeter
29.00 inHg
Observed at
EPH, 3 nm away

FAA reports on this event · 2

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