- Date
- September 29, 1991, 18:00 local (23:00 UTC)
- Place
- Greenville, IL
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N22VVUllman Vari Viggen
- Weather
- Visual (VMC) · Day
- Status
- Completed · report February 8, 1993
- Report
- Approved by Office Director
- FAA report
- 19910929043469A
- Case key
- 14865
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 NTSB’s determination of the probable cause, and any contributing factors.
Improper maintenance installation of the propeller.
Analysis
An owner built experimental airplane experienced separation of the wooden propeller during climb from takeoff. Examination of the failed attachment bolts showed the nuts had bottomed against the unthreaded shank while clinching the propeller hub to its flange.
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.
Aircraft
- Registration
- N22VV
- Reported as
- Ullman Vari Viggen (VARI VIGGE)
- Category
- Airplane, amateur-built
- Serial number
- 204
- Airframe hours
- 228
- Engine
- Lycoming O-320-E2A, 150 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Emerald J. Ullman
- Registered owner
- Emerald J. Ullman
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Unknown · April 2, 1991 · 34 hours before
- Destination
- 3K4 · Hillsboro, IL
- Airport
- GRE · Greenville Municipal, runway 18, 4,000 × 75 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
- 58
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Front
- Flight hours
- 1,293 total · 220 in this make and model · 1,251 as pilot in command · 22 in the last 90 days · 5 in the last 30 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 180° at 5 knots
- Visibility
- 50 statute miles
- Lowest ceiling
- None
- Temperature
- 79 °F, dew point 7 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.