# N974D: 1999 Kolb TWINSTAR MARK III C

- Status: Valid registration
- Airframe: [Kolb TWINSTAR MARK III C](https://openairdocs.org/model/kolb-twinstar-mark-iii-c) (registry code 05903C0, 2 seats)
- Engine: [Rotax 912UL series](https://openairdocs.org/engine/rotax-912ul-series) (registry code 55571)
- Serial number: TM 313
- Year built: 1999
- Type: Fixed wing single engine
- Engine type: 4 cycle
- Airworthiness: Experimental, registered before 01/31/08
- Airworthiness date: January 28, 2010
- Certificate issued: June 4, 2019
- Expires: June 30, 2029
- Mode S code: AD92CC
- Registered owner: [Pence Christian F](https://openairdocs.org/faa-owner/PENCE%20CHRISTIAN%20F)
- Location: [Colorado Springs, CO](https://openairdocs.org/faa-place/CO/Colorado%20Springs)
- Owner type: Individual
- Owner's area on the map: 38.8790° N, 104.8211° W: Placed by OpenAirDocs at the center of ZIP code 80907, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=974D
- Page: https://openairdocs.org/aircraft/N974D

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. The registry lists only the engine series, so ADs for every Rotax 912UL model are included.

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

### Matched by airframe (Kolb TWINSTAR MARK III C)

None in force.

### Matched by engine (Rotax 912UL series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N974D.

## FAA accident and incident reports

None matched to N974D.

## 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.

## Earlier aircraft with N974D

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N974D before.

- [Cancelled 1958-02-19](https://openairdocs.org/deregistered/N974D-1958-02-19): Stinson 108-2, S/N 108-2974. Exported to Canada. Owner: [Helm Bros Inc](https://openairdocs.org/faa-owner/HELM%20BROS%20INC), [Mandan, ND](https://openairdocs.org/faa-place/ND/Mandan)

## Related

- Other Kolb TWINSTAR MARK III C aircraft: https://openairdocs.org/model/kolb-twinstar-mark-iii-c/aircraft.md
- The Rotax 912UL series engine: https://openairdocs.org/engine/rotax-912ul-series.md

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