LAX96LA330

NTSB accident investigation · Burkhart Grob G102 · Warner Springs, CA · September 9, 1996

Accident · Minor injuriesLimited investigationFinal report
Date
September 9, 1996, 12:55 local (19:55 UTC)
Place
Warner Springs, CA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N3950BBurkhart Grob G102
Weather
Visual (VMC) · Day
Status
Completed · report December 20, 1996
Report
Approved by Office Director
FAA report
19960909026429A
Case key
29557

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

improper planning/decision by the pilot concerning a low altitude release to return to the airport after takeoff. Factors relating to the accident were: the pilot's inadequate preflight by failing to ensure that the yaw indicator string movement was free, when he closed the canopy; and the heavy sink (downdraft) that was encountered during the approach to land.

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.

In flight collision with objectApproach - vfr pattern - final approach
Aircraft preflight - inadequatePilot in commandFactor
Misc eqpt/furnishings - movement restrictedFactor
Precautionary landing - initiatedPilot in command
In-flight planning/decision - improperPilot in commandCause
Weather condition - downdraftFactor
Object - tree(s)

Analysis

In preparation for an aero tow takeoff, the pilot closed and secured the glider's canopy, and the aero tow proceeded. During the initial climb, the pilot recognized that the glider's yaw indicator string was caught in the canopy and was therefore unusable. The pilot decided to make a precautionary landing. At about 500 feet above ground level, he released the towline and attempted to return to the airport. According to the pilot, during the approach, he encountered heavy sink. The glider collided with trees and terrain short of the runway.

Factual narrative

On September 9, 1996, at 1255 hours Pacific daylight time, a Burkhart Grob G102, N3950B, operated by Sky Sailing, collided with trees and terrain approaching runway 26 at the Sky Sailing (uncontrolled) Airport, Warner Springs, California. Visual meteorological conditions prevailed at the time, and no flight plan was filed for the personal flight. The glider was substantially damaged, and the commercial pilot received minor injuries. The flight originated from Warner Springs at 1250.

According to the glider pilot, during the initial climb he observed that the glider's yaw indicator string was caught in his canopy and was unusable, so he elected to terminate the flight and make a precautionary landing. The pilot released the aero towline and attempted to return to the airport. At the time, the glider was approximately 500 feet above ground level. He stated in his accident report that while approaching the runway he encountered "heavy sink" and did not have sufficient altitude to clear the trees which were located near the runway.

The glider's owner reported that it was the pilot's responsibility to close the canopy before takeoff. Also, it was the pilot's responsibility to ensure that the yaw string was free from the canopy before the canopy was secured.

Aircraft

Registration
N3950B
Reported as
Burkhart Grob G102
Category
Glider
Serial number
5607CB
Airframe hours
1,840
Engine
unknown
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Sky Sailing
Registered owner
Bret G. Willat
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 26, 1996
Departed
CL35
Destination
CL35
Airport
CL35 · Sky Sailing, runway 26, 3,500 × 70 ft, asphalt

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
72
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
260 total · 200 as pilot in command · 6 in the last 90 days · 4 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 5 knots, gusting 10
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F

FAA reports on this event · 1

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