# N739B: 2007 Sport Copter VORTEX

- Status: Valid registration
- Airframe: [Sport Copter VORTEX](https://openairdocs.org/model/sport-copter-vortex) (registry code 05901T1, 1 seats)
- Engine: [Rotax 582SER](https://openairdocs.org/engine/rotax-582ser) (registry code 55556)
- Serial number: 104
- Year built: 2007
- Type: Gyroplane
- Engine type: 2 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: December 29, 2007
- Certificate issued: October 15, 2019
- Expires: October 31, 2029
- Mode S code: A9EC93
- Registered owner: [Bohbrink Clark G](https://openairdocs.org/faa-owner/BOHBRINK%20CLARK%20G)
- Location: [Brownsburg, IN](https://openairdocs.org/faa-place/IN/Brownsburg)
- Owner type: Individual
- Owner's area on the map: 39.8639° N, 86.3824° W: Placed by OpenAirDocs at the center of ZIP code 46112, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=739B
- Page: https://openairdocs.org/aircraft/N739B

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Sport Copter VORTEX)

None in force.

### Matched by engine (Rotax 582SER)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N739B.

## NTSB investigations on N739B not matched to an aircraft (2)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX90LA137](https://openairdocs.org/ntsb/LAX90LA137), Apr 4, 1990: Bell 47G (N739B), La Verne, CA, substantial damage. Probable cause: THE HELICOPTER'S ROTOR SYSTEM BEING ALLOWED TO UNDERSPEED AS A RESULT OF IMPROPER USE OF FLIGHT CONTROLS BY THE DUAL STUDENT; IMPROPER SUPERVISION BY THE CERTIFIED FLIGHT INSTRUCTOR; AND DELAYED…
- [NTSB FTW83FA232](https://openairdocs.org/ntsb/FTW83FA232), May 15, 1983: Bell 47G (N739B), Zachary, LA, substantial damage

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 20080714847169I](https://openairdocs.org/incident/20080714847169I), Jul 14, 2008: Amtr VORTEX (N739B), Platteville, WI, Minor damage. (-23) While practicing power off landings. Pilot flaired up to high, resulting in hard landing.

## Reports on N739B not matched to an aircraft (3)

They name N739B, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19900510026779I](https://openairdocs.org/incident/19900510026779I), May 10, 1990: Bell 47G (N739B), Hidden Glen, CA, Minor damage. Engine lost power. Instructor took control. Autorotated to landing. All usable fuel depeleted.
- [Accident 19900404013889A](https://openairdocs.org/incident/19900404013889A), Apr 4, 1990: Bell 47G (N739B), La Verne, CA, Substantial damage. Collided with runway on practice auto rotation. Reported vibration rotor decay prior impact. No mechanical defects.
- [Accident 19830515019409A](https://openairdocs.org/incident/19830515019409A), May 15, 1983: Bell H13B (N739B), Zachary, LA, Destroyed. Tail rotor gear box separated from helicopter. Fatigue failure of the studs that attach tail rotor caused crash.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Sport Copter VORTEX aircraft: https://openairdocs.org/model/sport-copter-vortex/aircraft.md
- The Rotax 582SER engine: https://openairdocs.org/engine/rotax-582ser.md

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