Revolution MINI-500 N500ZZ
27 July 1995 · Oshkosh, Wisconsin, United States · No injuries
Summary
On 27 July 1995 at about 14:30 local time, a Revolution MINI-500 registered N500ZZ was involved in an accident near Oshkosh, Wisconsin, United States. One person was on board and nobody was injured. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.
The record
- Date
- at 14:30
- Classification
- Accident
- Location
- Oshkosh, Wisconsin, United States
- Coordinates
- 44.0590, -88.5410
- Aircraft
- Revolution MINI-500
- Registration
- N500ZZ
- Category
- Helicopter
- Engines
- 1
- Operator
- Not recorded
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Personal
- Phase of flight
- Not recorded
- Aircraft damage
- Substantial
- Weather
- VMC
- Light
- Day
- NTSB number
- CHI95FA242
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
the inadequate design of the helicopter skid shoes. Factors related to the accident were: false indications of rotor rpm and EGT which led to seizure of the piston.
Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.
Read the full NTSB narrative
The amateur-built helicopter was conducting a demonstration flight during the annual EAA convention. During the first flight after re-jetting of the carburetor, the helicopter experienced a total loss of engine power. During the autorotation into a crop field, the helicopter was substantially damaged when the skid shoes caught in the terrain, failing the left skid and fracturing the shoe on that skid. Subsequent examination of the engine revealed that the rear piston had seized in the cylinder. The owner of the company which produces the helicopter stated that the re-jetting of the carburetor was made in an attempt to achieve what were thought to be correct readings in main rotor RPM and EGT after replacement of both gauges. The company owner attributed the piston seizure to the re-jetting. The skid shoes were new and had been tested only on concrete. The owner said that the design contributed to the damage to the helicopter.
Quoted verbatim from the NTSB record.
Other Revolution MINI accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 26 Oct 1997 | Revolution MINI-500 | Long Beach, California, United States | - | Serious injuries | - |
| 13 May 1998 | Revolution MINI-500 | Villa Rica, Georgia, United States | - | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 9 Mar 1995 | Cessna 152 | Waukesha, Wisconsin, United States | - | No injuries | - |
| 9 Oct 1995 | Piper PA-28-236 | Thorp, Wisconsin, United States | - | No injuries | - |
| 11 Oct 1995 | Cessna 172F | Danbury, Wisconsin, United States | John Watts | No injuries | - |
| 11 Oct 1995 | Roisum Team MINI-MAX | Neenah, Wisconsin, United States | - | Minor injuries | - |
| 23 Apr 1995 | Piper J-3 | Elk Creek, Wisconsin, United States | - | Minor injuries | - |
| 25 Oct 1995 | Cessna 170B | Oconomowoc, Wisconsin, United States | - | Minor injuries | - |