NYC83LA135

NTSB accident investigation · Burkhart Grob 109 · Finleyville, PA · June 5, 1983

Accident · Serious injuriesLimited investigationFinal report
Date
June 5, 1983, 17:30 local (21:30 UTC)
Place
Finleyville, PA
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N903BGBurkhart Grob 109
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19830605026049A
Case key
35197

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.

Loss of control - on ground/waterTakeoff - roll/run
Directional control - not maintainedPilot in commandCause
Ground loop/swerve - inadvertentPilot in commandFactor
On ground/water encounter with terrain/waterTakeoff - roll/run
Terrain condition - high vegetationFactor
Forced landingLanding - flare/touchdown
In flight collision with objectLanding - flare/touchdown
Object - tree(s)Factor

Analysis

The motorized glider collided with trees and the terrain during an emergency landing after the prop had struck the ground during takeoff. During the takeoff roll the propeller 1st collided with high grass and then a bump in the ground after the pilot lost directional control and veered off the mowed runway. The takeoff was continued and after takeoff the aircraft was turned downwind for a landing. The propeller vibrated excessively as the turn was made and the pilot shut the engine down and feathered the prop at about 100 feet AGL while over the hangers. While lining up with the runway the acft collided with trees which stalled the glider and it nosed into the ground.

Aircraft

Registration
N903BG
Reported as
Burkhart Grob 109
Category
Glider
Serial number
6095
Airframe hours
74
Engine
Limbach L-2000EB1A, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Berri Powers Plus Two Others
Airworthiness certificate
Standard, Normal
Last inspection
Unknown · December 13, 1982 · 0 hours before
Flight plan
Unknown
Airport
GO5 · Findleyville

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
50
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
573 total · 22 in this make and model · 505 as pilot in command · 15 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
225° at 9 knots
Visibility
15 statute miles
Temperature
81 °F, dew point 54 °F
Altimeter
29.00 inHg

FAA reports on this event · 1

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