- Date
- December 28, 2009, 13:30 local (19:30 UTC)
- Place
- Eldon, MO
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N491DSLyman Randall/Scott David Avid Flyer
- Defining event
- Maneuvering: Aerodynamic stall/spin
- Weather
- Visual (VMC) · Day
- Status
- Completed · report May 6, 2010
- Report
- Approved by Office Director
- NTSB office
- Central Region
- Parties
- FAA-Kansas City FSDO
- FAA report
- 20091228053139A
- Case key
- 75231
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 pilot's inability to climb or maintain proper airspeed due to the improper pitch setting of the propeller.
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.
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 pilot reported that he was preparing the homebuilt airplane for its first flight for the owner. He said that on the morning of the accident the airplane's engine was run for approximately 30 minutes for break-in at full power. After the engine run the cowling was reinstalled and the engine ran for an additional 15 minutes. Subsequently, the pilot performed taxi testing of the airplane. He had made 2 taxi tests to about 40 miles per hour, which he estimated would be the airplane's approximate stall speed. He stated that on the third taxi test, when about two-thirds of the way down the runway, a gust of wind caused the airplane to become airborne. The pilot stated that when he was able to get the airplane under control there was insufficient runway remaining to perform a landing and he decided to continue and return for landing. He stated that this was to be a taxi test only and that he had no intention to fly the airplane at that time. While attempting to climb, the pilot noticed that the engine speed was too high and he was not able to climb effectively. The pilot attempted to turn the airplane back to the airport to make a downwind landing, but the airplane began to stall. He stated that he lowered the nose and determined that he would not be able to make the runway. As the airplane's altitude decayed, the pilot pulled back on the stick and the airplane struck the ground. The pilot stated that he believed that the pitch setting of the airplane's propeller was improper, which did not allow proper thrust production for flight. During the accident the propeller blades were fragmented and determination of the installed pitch setting could not be obtained.
Factual narrative
The pilot reported that he was preparing the homebuilt airplane for its first flight for the owner. He said that on the morning of the accident the airplane's engine was run for approximately 30 minutes for break-in at full power. After the engine run the cowling was re-installed and the engine run for an additional 15 minutes. Subsequently, the pilot performed taxi testing of the airplane. He had made 2 taxi tests to about 40 miles per hour which he estimated would be approximately stall speed for the airplane. He stated that on the third taxi test, when about two-thirds of the way down the runway, a gust of wind caused the airplane to become airborne. The pilot stated that when he was able to get the airplane under control there was insufficient runway remaining to perform a landing and he decided to continue and return for landing. He stated that this was to be a taxi test only and that he had no intention to fly the airplane at that time. While attempting to climb, the pilot noticed that the engine speed was too high and he was not able to climb effectively. The pilot attempted to turn the airplane back to the airport to make a downwind landing, but the airplane began to stall. He stated that he lowered the nose and determined that he would not be able to make the runway. As the airplane's altitude decayed, the pilot pulled back on the stick and the airplane struck the ground. The pilot stated that he believed that the pitch setting of the airplane's propeller was improper which did not allow proper thrust production for flight. During the accident the propeller blades were fragmented and determination of the installed pitch setting could not be obtained.
Aircraft
- Registration
- N491DS
- Reported as
- Lyman Randall/Scott David Avid Flyer
- Category
- Airplane, amateur-built
- Serial number
- 491
- Engine
- Rotax 582, 65 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Flight test · Part 91
- Airworthiness certificate
- Special, Experimental (Special)
- Departed
- H79 · Eldon, MO
- Destination
- H79 · Eldon, MO
- Airport
- H79 · Eldon Model Airpark, runway 36, 3,300 × 75 ft, concrete
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
- 60
- Injuries
- Minor
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, With waivers/limitations
- Last flight review
- July 12, 2009
- Seat
- Left
- Flight hours
- 1,500 total · 0 in this make and model · 3 in the last 90 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 270° at 13 knots, gusting 17
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 39 °F, dew point 23 °F
- Altimeter
- 30.26 inHg
- Observed at
- AIZ, 16 nm away
Docket · 1
The files NTSB released with the investigation on February 12, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.0 MB in all.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.