DEN08CA056

NTSB accident investigation · Burkhart Grob G-103A Twin II Acro · Alamogordo, NM · February 9, 2008

Accident · No injuriesData collectionFinal report
Date
February 9, 2008, 10:35 local (17:35 UTC)
Place
Alamogordo, NM
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N223WPBurkhart Grob G-103A Twin II Acro
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 2008
Report
Approved by Office Director
FAA report
20080209012659A
Case key
67544

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The unsuitable terrain for landing. Contributing to the accident were the pilot's encounter with turbulence and the loss of visual contact with the tow plane.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

TurbulenceEnvironmental issues › Conditions/weather/phenomena · Not specifiedBurkhart Grob G-103A TWIN II ACRO: 1 caseAll aircraft: 92 casesProbable cause
Personnel issuesPersonnel issues › Task performance · PilotBurkhart Grob G-103A TWIN II ACRO: 1 caseAll aircraft: 137 casesProbable cause
Runway/land/takeoff/taxi surfaceEnvironmental issues › Physical environment · Not specifiedBurkhart Grob G-103A TWIN II ACRO: 1 caseAll aircraft: 253 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The glider encountered turbulence at approximately 200 feet above ground level. The glider gained altitude such that the pilot lost sight of the tow plane. The pilot decided to release the glider and attempt a right turn back to the airport to land. He stated, "the altitude was too low to complete the turn, so I leveled the wings and landed the glider off-field." Upon landing, the left wing contacted the terrain and the glider ground looped, resulting in substantial damage to the fuselage and horizontal stabilizer.

Factual narrative

According to the pilot's statement, the glider was being towed aloft when it encountered turbulence at approximately 200 feet above ground level. The glider gained altitude such that the pilot lost sight of the tow plane. The pilot decided to release the glider and attempt a right turn back to the airport to land. The pilot stated, "The altitude was too low to complete the turn, so I leveled the wings and landed the glider off-field." Upon landing, the left wing contacted terrain and the glider ground looped. Examination of the glider revealed the rear fuselage was broken in front of the vertical stabilizer, the nose gear sheared off, and the horizontal stabilizer was bent at the connection to the vertical stabilizer. The pilot and single passenger were not injured.

Aircraft

Registration
N223WP
Reported as
Burkhart Grob G-103A Twin II Acro
Category
Glider
Serial number
3735
Engine
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Christian Nickel
Registered owner
White Sands Soaring Association
Airworthiness certificate
Standard, Normal
Departed
KALM · Alamogordo, NM
Airport
ALM · Alamogordo-White Sands Regiona

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
49
Injuries
None
Certificate
Commercial
Flight hours
631 total · 631 in this make and model · 5 in the last 90 days · 4 in the last 30 days

Weather

Conditions
Visual (VMC) · Day

FAA reports on this event · 1

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