FTW98FA310 · Air Command International, Inc C-147A
Air Command International, Inc C-147A · Accident: loss of control in flight while maneuvering
From 7F3 to an unrecorded destination
Event
- NTSB case
- FTW98FA310
- 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
Air Command International, Inc C-147A
- Aircraft type
- Air Command C-147
- Category
- Gyroplane · from aircraft type
- 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
- N147GY
- Operator
- Harold F. Smith · private individual
- Onboard fatalities
- Unknown
- Route
- From 7F3To 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
- 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 › Rotor RPM, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
While maneuvering during a test flight, the gyroplane impacted terrain following a loss of rotor rpm. Witnesses reported that the gyroplane departed the runway to the south and made a 180 degree turn to a northerly heading. At the mid-point of the runway, the gyroplane entered a left turn. A witness stated that he noted a decay of rotor blade speed and then observed the main rotor blades contact the tail section. A second witness stated that he heard 'rotor blades slowing down.' The gyroplane impacted terrain in a nose low attitude and was consumed by fire. The airframe and engine were examined, and no anomalies were found that would have prevented operation of the aircraft.
Probable cause
The pilot's failure to maintain rotor rpm while maneuvering, which resulted in the main rotor blades contacting the tail section of the gyroplane.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW98FA310
- Event ID
- 20001211X10556
- Case number
- FTW98FA310
- 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: d9084216de33dcb80a8b2d724dd57c957c5b7a6365cb29a287f1f16560d23271; retrieved 2026-09-20T22:30:35.869Z.