Amateur-built B-8M accident near Herington, Kansas, May 22, 1983
On May 22, 1983 at about 11:10 pm local time, a amateur-built B-8M, registered UNREG, was substantially damaged in an accident near Herington, Kansas (Herington Muni airport). It was a personal flight under general aviation rules (Part 91). 1 person was killed. The weather was visual conditions (good weather).
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The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 4, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 22, 1983 · about 11:10 pm local time
- Place
- Herington, Kansas · Herington Muni · map
- Type
- Accident
- Injuries
- 1 person was killed.
- Weather
- visual conditions (good weather)
- Aircraft
- Amateur-built B-8M · all B-8Ms on the register
- Registration
- UNREG · no longer on the register
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
THE BUILDER/PLT PURCHASED THE BASIC AIRFRAME & ROTOR KIT FROM BENSEN, BUT PURCHASED THE ENG FROM ANOTHER SOURCE. THE ENG WAS NOT MODIFIED IAW BENSEN INSTRUCTIONS. REPORTEDLY, THE PLT WAS ONLY GOING TO CONDUCT TAXI & GROUND RUNS WHEN HE STARTED AT APRX 1100 CDT. HOWEVER, AFTER A NUMBER OF TAXI & HI SPEED RUNS, THE GYROCOPTER WAS OBSERVED TO TAKEOFF AT APRX 1800 CDT. AFTER TAKEOFF, THE PLT TURNED TO A DOWNWIND, THEN A BASE LEG. A WITNESS REPORTED SEEING SOMETHING FALL FROM THE ACFT BEFORE IT DESCENDED FROM HIS VIEW. SUBSEQUENTLY, THE ACFT CRASHED APRX 1500 FT FROM THE APCH END OF THE RWY IN A 50 TO 55 DEG BANK. A 6 GAL FUEL CAN WAS FOUND APRX 90 FT FROM THE ACFT. THE CAN HAD BEEN ATTACHED WITH 2 ELASTIC SHOCK CORDS, WHICH WAS NOT IAW BENSEN INSTRUCTIONS. PAINT & SCRAPE MARKS ON THE ROTOR BLADES & THE FUEL CAN MATCHED ONE ANOTHER. THE PLT WAS NOT CERTIFICATED & NO EVIDENCE WAS FOUND THAT HE HAD PREVIOUS FLT EXPERIENCE. THE WORD 'ULTRALIGHT' WAS FOUND PAINTED ON THE MAST OF THE GYROCOPTER.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Ratings: single-engine land
- Medical certificate: Unknown
- Seat: ctr
The aircraft
- Last inspection: inspection type not recorded
- Maximum gross weight: 550 lb
- Seats: 1
- Landing gear: fixed
- Engine: Mcculloch 4318-A (piston); 0 hours total
The flight
- Flight plan: none
- Runway 35, 4,200 ft by 150 ft
Weather at the time
- Light: daylight
- Wind: from 010° at 15 knots
- Visibility: 15 statute miles
- Sky: scat at 5,500 ft
- Temperature: 72°F (22°C), dew point 48°F (9°C)
- Altimeter: 29.00 inHg
- Observation at 9:55 pm from SLN
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Other NTSB records under UNREG the same tail number, which may have belonged to a different aircraft at the time
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The docket at the NTSB holds the report as a PDF and the investigation's photographs and documents. This site never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number MKC83FA113.