- Date
- August 8, 2010, 11:00 local (18:00 UTC)
- Place
- Davis, CA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N71031Hemmer MINI-MAX 1600R
- Defining event
- Landing-landing roll: Loss of control on ground
- Weather
- Visual (VMC) · Day
- Status
- Completed · report March 16, 2011
- Report
- Approved by Office Director
- NTSB office
- Western Pacific Region
- Parties
- Federal Aviation Administration
- FAA report
- 20100808042319I
- Case key
- 77102
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 airplane’s encounter with the wake turbulence of another aircraft.
Findings · 2
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 while flying on the downwind leg of the traffic pattern in a single seat, tailwheel-equipped ultralight type airplane, he observed a Cessna airplane take off from the runway. When the Cessna was clear of the runway, the pilot conducted an uneventful wheel landing. During the landing roll, as the airplane approached the area where the Cessna lifted off, the airplane lifted off of the runway surface. The pilot applied full power but the airplane touched down hard, substantially damaging the wings and fuselage. The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engine.
Factual narrative
The pilot reported that while flying on the downwind leg of the traffic pattern in a single seat, tailwheel-equipped ultralight type airplane, he observed a Cessna airplane takeoff from the runway. When the Cessna was clear of the runway the pilot conducted an uneventful wheel landing. During the landing roll, as the airplane approached the area where the Cessna lifted off, the airplane was “picked up” from the runway. The pilot applied full power but the airplane was “slammed down hard,” substantially damaging the wings and fuselage. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident.
Aircraft
- Registration
- N71031
- Reported as
- Hemmer MINI-MAX 1600R
- Category
- Airplane
- Serial number
- JH001
- Airframe hours
- 139
- Engine
- Rotax 447, 40 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Hemmer Joseph L
- Registered owner
- Hemmer Joseph L
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Condition · November 6, 2009 · 2 hours before
- Departed
- KDWA · Davis, CA
- Destination
- KDWA · Davis, CA
- Airport
- KDWA · Yolo County Airport, runway 16, 6,000 × 100 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
- 73
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Last flight review
- October 3, 2009
- Seat
- Single
- Flight hours
- 80 total · 6 in this make and model · 80 as pilot in command · 7 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 190° at 4 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 72 °F, dew point 57 °F
- Altimeter
- 29.85 inHg
- Observed at
- KEDU, 5 nm away
Docket · 1
The files NTSB released with the investigation on October 6, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 522 KB 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.