SEA94LA202

NTSB accident investigation · Groce Vans RV-4 · Glendive, MT · August 1, 1994

Accident · FatalLimited investigationFinal report
Date
August 1, 1994, 14:15 local (20:15 UTC)
Place
Glendive, MT
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N7GJGroce Vans RV-4
Weather
Visual (VMC) · Day
Status
Completed · report October 13, 1995
Report
Approved by Office Director
FAA report
19940801019839A
Case key
41992

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

Airspeed was not maintained after takeoff. A factor was high density altitude.

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 terrain/waterTakeoff - initial climb
Weather condition - high density altitudeFactor
Airspeed - not maintainedPilot in commandCause

Analysis

An airline customer service agent observed the aircraft during takeoff, noting that it was airborne at 10 to 15 feet above the ground and 'not really gaining altitude.' She did not witness the crash. The captain of a commuter flight noted that 'after rotation approx 25' or so, his left wing dipped downward, aircraft seemed under powered. It was hot, Density alt(itude) 5200' lite gusty winds.' The commuter captain did not see the aircraft crash. Witnesses noted that the airplane became airborne in the first quarter of the runway. During on-site inspection, FAA inspectors noted that the aft cockpit was loaded with camping gear, including a tent, campstove, six cans of food, a large clothing bag, camera, headset, and five or six jars, as well as an extensive collection of aviation literature. When the wreckage was inspected, no mechanical discrepancies were noted by FAA personnel.

Factual narrative

On August 1, 1994, at 1415 mountain daylight time, an experimental Groce Vans RV-4, N7GJ, was destroyed when it collided with terrain after takeoff from runway 20 at Glendive, Montana. The commercial pilot, the sole occupant, was fatally injured in the crash. There was no flight plan filed for the flight, which was conducted in visual meteorological conditions. The aircraft was destroyed by post-crash fire. No report of an ELT was made.

The pilot had stopped at Glendive to refuel his aircraft after visiting a fly-in in Oshkosh, Wisconsin. The aircraft was fueled with 17.5 gallons of auto gas. Before leaving, the pilot stated that he thought the fuel required to top off the aircraft would have been 16 gallons.

A Big Sky Airlines customer service agent observed the aircraft during takeoff, noting that he was airborne at 10 to 15 feet above the ground and "not really gaining altitude." She did not witness the crash. The captain of the commuter flight noted that "after rotation approx 25' or so, his left wing dipped downward, aircraft seemed under powered. It was hot, Density alt(itude) 5200' lite gusty winds." The commuter captain did not see the aircraft crash.

During on-site inspection, FAA inspectors noted that the aft cockpit was loaded with camping gear, including a tent, campstove, six cans of food, a large clothing bag, camera, headset, and five or six jars, as well as an extensive collection of aviation literature. Witnesses observed the takeoff, but did not see the crash. They noted that the aircraft became airborne in the first quarter of the runway.

When the wreckage was inspected, no mechanical discrepancies were noted by FAA personnel.

Empty weight of the aircraft was noted to be 875 pounds, May 23, 1987. At the time of weighing, the aircraft was unpainted, landing gear leg fairings and wheel pants, metal wing fairings, seat cushions, rear control stick, and avionics were not installed on the aircraft. Maximum gross weight is 1500 pounds, and total fuel capacity is 32 gallons. Density altitude was calculated to be 5332 feet.

An autopsy was performed on the pilot by Pathology Consultants, PC, Billings, Montana, for the Dawson County Coroner. The Pathologist noted that the pilot died from blunt force injuries. No causes predisposing to the accident could be seen on post morem examination. Toxicological testing was done by the FAA with negative results for drugs and ethanol.

Aircraft

Registration
N7GJ
Reported as
Groce Vans RV-4
Category
Airplane, amateur-built
Serial number
0427
Engine
Lycoming O-320-E2D, 150 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Operator
Groce, John L.
Registered owner
Groce, John L.
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · May 1, 1988
Destination
Unknown
Airport
GDV · Dawson Community Airport, runway 20, 3,000 × 60 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
43
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Front
Toxicology
Performed
Flight hours
1,471 total · 56 in the last 90 days · 22 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
93 °F, dew point 46 °F
Altimeter
29.00 inHg
Observed at
GDV

FAA reports on this event · 1

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