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Accidents · NTSB DEN88LA123 · Preliminary: the investigation is not finished

Helio H-295 accident near Encampment, Wyoming, June 5, 1988

On June 5, 1988 at about 11:00 pm local time, a Helio H-295, registered N6454V, was destroyed in an accident near Encampment, Wyoming (Mill Creek Strip airport). It was a personal flight under general aviation rules (Part 91). 2 people were seriously injured. The weather was visual conditions (good weather).

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 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
June 5, 1988 · about 11:00 pm local time
Place
Encampment, Wyoming · Mill Creek Strip · map
Type
Accident
Injuries
2 people were seriously injured.
Weather
visual conditions (good weather)
Aircraft
Helio H-295 · all H-295s on the register
Registration
N6454V · registry record · serial 1406
Damage
Destroyed
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

THE PLT STATED HE CALCULATED THE DENSITY ALTITUDE TO HAVE BEEN 11,300 FT AT TAKEOFF. HE SAID THE ACFT WAS NEAR MAX GROSS WT AND THAT THE GRASS STRIP HE DEPARTED FROM WAS APPROX 1,500 FT LONG. THE PLT STATED 'I WAS ON THE ON THE BACK SIDE OF THE PWR CURVE AS ALWAYS WITH A STOL TAKEOFF.' THE ACFT WOULD NOT CLIMB HIGHER THAN 50 FT AGL AFTER TAKEOFF. THE PLT DECIDED TO EXECUTE A 'CONTROLLED CRASH.' THE ACFT STRUCK SEVERAL TREES AND CAME TO REST IN A BEAVER POND. THE WRECKAGE WAS DESTROYED BY A POST CRASH FIRE. THE GRASS STRIP IS SURROUNDED BY TREES AND HIGH MOUNTAINOUS TERRAIN.

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

  • Certificate: private
  • Ratings: single-engine land
  • Flight time: 500 hours in all; 300 in this make and model; 3 in the last 90 days; 3 in the last 30 days; 50 as pilot in command
  • Medical certificate: Class 2 (valid medical--w/ waivers/lim.)
  • Seat: left

The aircraft

  • Last inspection: inspection type not recorded
  • Maximum gross weight: 3,200 lb
  • Seats: 6
  • Landing gear: fixed
  • Engine: Lycoming GO-480 (piston); 0 hours total
  • Fire on the ground

The flight

  • Departed from: Encampment WY at 10:55 pm
  • Destination: 1V5 Boulder CO
  • Flight plan: none
  • Runway 27, 1,500 ft by 50 ft

Weather at the time

  • Light: daylight
  • Visibility: 100 statute miles
  • Sky: clear
  • Temperature: 75°F (24°C), dew point 0°F (-18°C)
  • Altimeter: 29.00 inHg

Injuries

FatalSeriousMinorNone
Crew1
Passengers1

Documents from the investigation the NTSB's docket: the evidence folder behind the report

The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.