NYC90LA193

NTSB accident investigation · Schweizer SGS 1-35 · Erwinna, PA · August 14, 1990

Accident · Minor injuriesLimited investigationFinal report
Date
August 14, 1990, 13:03 local (17:03 UTC)
Place
Erwinna, PA
Injuries
1 minor
Damage
Destroyed
Phase of flight
Takeoff
Aircraft
N34461Schweizer SGS 1-35
Weather
Visual (VMC) · Day
Status
Completed · report September 28, 1992
Report
Approved by Office Director
FAA report
19900814032989A
Case key
36715

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

Inadvertent release of the tow line at low altitude. A contributing factor was the landing in unsuitable terrain.

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.

Airframe/component/system failure/malfunctionTakeoff - roll/run
Glider launch/tow equipment - disconnectedCause
In flight collision with terrain/waterLanding
Terrain condition - rough/unevenFactor
Directional control - not maintainedPilot in command
Terrain condition - dirt bank/rising embankment

Analysis

During takeoff roll the tow rope became slack and as the glider started its initial climb out to about 50 feet a.g.l. the rope slipped aft off of the tow hook. During the off airport landing, the nose touched a high mound of dirt, dropping the left wing. The pilot lost directional control and the glider skidded about 40 feet on the right wing coming to rest in the opposite direction of landing.

Aircraft

Registration
N34461
Reported as
Schweizer SGS 1-35
Category
Glider
Serial number
41
Engine
unknown
Damage
Destroyed
Flight
Personal · Part 91
Operator
Richard Allen Giboney
Airworthiness certificate
Standard, Normal
Destination
9N1
Airport
9N1 · Van Sant

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
Certificate
Private
Medical
Unknown
Flight hours
439 total · 350 in this make and model · 350 as pilot in command · 17 in the last 90 days · 3 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Temperature
81 °F, dew point -0 °F

FAA reports on this event · 1

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