NYC92LA033

NTSB accident investigation · Schweizer SGS-1-36 · Erwinna, PA · November 15, 1991

Accident · Serious injuriesLimited investigationFinal report
Date
November 15, 1991, 14:30 local (19:30 UTC)
Place
Erwinna, PA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N3617CSchweizer SGS-1-36
Weather
Visual (VMC) · Day
Status
Completed · report April 23, 1993
Report
Approved by Office Director
FAA report
19911115052079A
Case key
37110

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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Probable cause

The pilot rotated the glider prematurely, resulting in an inadvertent stall at too low an altitude to allow recovery. Factors related to the accident were the pilot's total lack of experience in gliders, no experience in this type of glider, and improper trim setting.

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.

Loss of control - in flightTakeoff - initial climb
Preflight planning/preparation - inadequatePilot in commandFactor
Lack of total experience in type of aircraftPilot in commandFactor
Trim setting - improperPilot in commandFactor
Rotation - prematurePilot in commandCause
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - groundCause

Analysis

Just after lift off the glider ballooned above the tow plane. The pilot used elevator control to lower the altitude which resulted in the glider making contact with the runway and causing damage to the horizontal stabilizer. The glider climbed above the tow plane again, then pitched nose down into the ground. According to the pilot this was his first flight in this type of glider and he said he estimated the trim setting because he was not familiar with the trim system on this type of glider.

Aircraft

Registration
N3617C
Reported as
Schweizer SGS-1-36
Category
Glider
Serial number
12
Airframe hours
360
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Operator
James S. Neithercott
Registered owner
Freedom'S Wings Int'L
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 2, 2000 · 20 hours before
Airport
9N1 · Van Sant, runway 23, 3,000 × 400 ft, grass/turf

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
44
Certificate
Private
Medical
Unknown
Seat
Front
Flight hours
54 total · 16 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Temperature
50 °F

FAA reports on this event · 1

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