- Date
- July 24, 2018, 10:03 local (15:03 UTC)
- Place
- Oshkosh, WI
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N45FTJust JA30 Superstol
- Defining event
- Takeoff: Loss of control in flight
- Weather
- Visual (VMC) · Day
- Status
- Completed · report March 18, 2019
- Report
- Approved by Office Director
- NTSB office
- Central Region
- Parties
- Federal Aviation Administration
- FAA report
- 20180724017839A
- Case key
- 97871
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 failure to maintain adequate airspeed during the initial climb and his exceedance of the airplane's critical angle of attack, which resulted in an aerodynamic stall.
Findings · 5
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 private pilot stated that, during the initial climb after takeoff, the flight controls got mushy, and the airplane began to sink. The pilot added flaps and verified engine throttle position; however, the airplane continued to sink, and the flight controls continued to feel mushy. The pilot pushed the airplane's nose forward and retracted the flaps. The airplane descended and hit a ditch and gravel road before coming to rest adjacent to a chain-link fence. Examination of the airplane and related systems revealed no preimpact mechanical anomalies that would have precluded normal operation. The pilot's statement, along with the video of the accident, revealed that the ;ilot did not maintain an adequate airspeed during the initial climb and should have climbed more shallowly. Due to the low airspeed and his exceedance of the airplane's critical angle of attack, the airplane aerodynamically stalled.
Factual narrative
The private pilot stated that, during the initial climb after takeoff, after "leveling out" and seeing an increase in airspeed, "the [flight] control got mushy, and the airplane began to sink slightly." The pilot added flaps and verified engine throttle position; however, the airplane continued to sink, and the flight controls continued to feel mushy. The pilot pushed the nose forward and retracted the flaps. The airplane descended and hit a ditch and gravel road before coming to rest adjacent a chain-linked-fence. Both wings were bent down and partially separated, both main landing gear collapsed, and the fuselage was impact damaged. The pilot stated that there were no mechanical failures or malfunctions of the airplane. A video of the accident corroborated the pilot's statement. An examination of the airplane, conducted by the National Transportation Safety Board investigator in charge and Federal Aviation Administration inspectors, revealed no mechanical anomalies that would have precluded normal operations.
Aircraft
- Registration
- N45FT
- Reported as
- Just JA30 Superstol
- Category
- Airplane, amateur-built
- Serial number
- JA263-03-12
- Built
- 2015
- Airframe hours
- 103
- Engine
- Rotax 912UL, 100 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Condition · February 2, 2018
- Departed
- OSH · Oshkosh, WI
- Destination
- OSH · Oshkosh, WI
- Airport
- OSH · Wittman Rgnl
- Equipment
- Electronic primary flight display, Handheld GPS
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
- 42
- Injuries
- Minor
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Without waivers/limitations
- Last flight review
- June 25, 2018
- Seat
- Left
- Restraint
- 4-point
- Flight hours
- 319 total · 113.1 in this make and model · 253.3 as pilot in command · 15.3 in the last 90 days · 6.9 in the last 30 days · 0.4 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Visibility
- 7 statute miles
- Lowest ceiling
- None
- Temperature
- 73 °F, dew point 68 °F
- Altimeter
- 30.01 inHg
- Observed at
- KOSH, 1 nm away
Docket · 2
The files NTSB released with the investigation on August 23, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 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.