FTW99LA125

NTSB accident investigation · Oakes J3 CUB · Greenbriar, AR · April 29, 1999

Accident · Serious injuriesLimited investigationFinal report
Date
April 29, 1999, 11:25 local (16:25 UTC)
Place
Greenbriar, AR
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N105LMOakes J3 CUB
Weather
Visual (VMC) · Day
Status
Completed · report June 21, 2000
Report
Approved by Office Director
FAA report
19990429045459A
Case key
46225

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

The student pilot's failure to compensate for the gusty wind condition while maneuvering, which resulted in the inadvertent stall. A factor was the gusty wind condition.

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 flightManeuvering
Weather condition - gustsFactor
Compensation for wind conditions - not performedPilot in commandCause
Stall/spin - inadvertentPilot in command
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The 71 hour student pilot reported that while maneuvering his experimental homebuilt airplane, 'the aircraft entered a slow right hand, uncontrolled turn, [and] continued [in] that mode of flight until impacting the earth.' A witness reported observing the airplane's nose drop as it made a right turn. Subsequently, the airplane's right wing and nose impacted the ground. The witness further reported that the engine was running during the entire event. According to the FAA inspector, high gusty wind conditions prevailed at the time of the accident.

Factual narrative

On April 29, 1999, approximately 1125 central daylight time, an Oakes J-3 Cub experimental homebuilt airplane, N105LM, was substantially damaged during terrain impact while maneuvering near Greenbriar, Arkansas. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal cross-country flight. The aircraft was owned and operated by the pilot/builder. The student pilot, sole occupant of the aircraft, sustained minor injuries. The flight originated from Clinton, Arkansas, with a destination of Chael, a private airstrip near Wooster, Arkansas.

A witness reported observing the aircraft's nose drop as it made a right turn. Subsequently, the aircraft's right wing and nose impacted the ground. The witness further reported that the engine was running during the entire event.

The 71-hour student pilot reported to the FAA inspector that "the aircraft entered a slow right hand, uncontrolled turn, [and] continued [in] that mode of flight until impacting the earth." The aircraft came to rest inverted.

Examination of the aircraft wreckage by the FAA inspector revealed that the engine was separated from the fuselage. The outboard section of the right wing was separated. The left and right wings were partially separated from the fuselage. The main landing gear was separated from the fuselage.

According to the FAA inspector, high gusty wind conditions prevailed at the time of the accident.

Aircraft

Registration
N105LM
Reported as
Oakes J3 CUB
Category
Airplane, amateur-built
Serial number
LM-1057
Airframe hours
63
Engine
Rotax 503-CDI, 48 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Donald C. Oakes
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · August 3, 1998 · 63 hours before
Departed
4M4 · Clinton, AR
Destination
NONE

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
Student
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
71 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
280° at 8 knots
Visibility
10 statute miles
Lowest ceiling
2,500 ft overcast
Temperature
61 °F, dew point 52 °F
Altimeter
30.00 inHg
Observed at
RUE, 34 nm away

FAA reports on this event · 1

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