LAX84FU023

NTSB accident investigation · Motorized Gliders Tierra · Bullhead City, AZ · December 3, 1983

Accident · Serious injuriesFinal report
Date
December 3, 1983, 09:12 local (16:12 UTC)
Place
Bullhead City, AZ
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
UNREGMotorized Gliders Tierra
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
24012

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 - in flightTakeoff - initial climb
Airspeed - not maintainedPilot in commandCause
Stall - inadvertentPilot in commandCause
Lack of familiarity with aircraftPilot in commandCause
In flight collision with terrain/waterTakeoff - initial climb

Analysis

According to the plt, he had no previous flt time in ultralight acft. Before taking off, he taxied the ultralight several times to get the feel of the vehicle. During departure, the plt took off from a taxi strip west of rwy 17. The strip was used by ultralight plts for all takeoffs & landings. The plt stated that shortly after departing & while negotiating a left turn, the left wing stalled & there was insufficient altitude to recover. According to the operator, the left turn was started at about 50 ft AGL, then the ultralight stalled. He further stated that the eng sounded normal thru-out the sequence & that the vehicle was climbing at a very slow speed before the accident. An exam of the airframe & eng disclosed no preimpact, mechanical malfunction or failure.

Aircraft

Registration
UNREG
Reported as
Motorized Gliders Tierra
Category
Ultralight, amateur-built
Engine
Rotax 337, 35 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 103
Operator
Marvin L Robinson
Registered owner
Motorized Gliders Of Iowa,Inc.
Airport
P06 · Bullhead City

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
38
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Center

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 2 knots
Visibility
75 statute miles
Lowest ceiling
None
Temperature
64 °F