DEN87FA216 · Great Lakes 2T-1A
Great Lakes 2T-1A · Accident: loss of control in flight while maneuvering
From Bozeman Yellowstone International Airport (BZN) to an unrecorded destination
Event
- NTSB case
- DEN87FA216
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 1 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Great Lakes 2T-1A
- Aircraft type
- Great Lakes 2
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N313Y
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Bozeman Yellowstone International Airport (BZN), Belgrade, MTTo not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Maneuvering
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Loss of control in flight
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Pole; Guy wire
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Destroyed
Cause areas
- Pilot in command › Flight controls, improper use of
- Pilot in command › Physical impairment(other organic problem)
- Pilot in command › Spatial disorientation
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
74-YEAR-OLD PLT WAS PERFORMING AEROBATICS AT SMALL ARPT FOR LOCAL TV NEWS STATION TO PROMOTE WEEKEND AIRSHOW. PLT MADE RIGHT & LEFT PASS, EACH PASS CONSISTING OF SHALLOW DESCENT, PULLUP FROM APRX 150 TO 200 FT AGL, & SLOW ROLL. PLT BEGAN THIRD PASS FROM STRAIGHT & LEVEL ATTITUDE & ROLLED ACFT INVERTED. AT 180 DEG POINT, ACFT YAWED 30 DEG LEFT OF RWY CENTERLINE. AS ACFT ROLLED PAST 270 DEG POINT, IT SIDE-SLIPPED, LOST ALT RAPIDLY, & COLLIDED WITH TELEPHONE POLE, GUY WIRE, & COMMERCIAL BUILDING. PLT EXPIRED APRX 31 HRS LATER. NO EVIDENCE OF PRE-IMPACT MECHANICAL FAILURE/MALFUNCTION OF ACFT, ENG, PROP, OR FLT CONTROLS FOUND. AUTOPSY & TOXICOLOGY RESULTS WERE NEGATIVE. WX WAS VFR. PLT HAD INNER EAR INFECTION IN LATE 1983. DOCTOR LATER DIAGNOSED IT AS 'BENIGN POSITIONAL PAROXYSMAL VERTIGO.' PLT WAS REPORTEDLY SYMPTOMATIC UP TO TIME OF ACCIDENT.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record DEN87FA216
- Event ID
- 20001213X31768
- Case number
- DEN87FA216
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: e9144e476a65ebf594baa5bec7691289803831b217c47812a1183c5eb389ea36; retrieved 2026-09-21T04:02:19.690Z.