# N1978M: 2015 Couillard Michael R TWINSTAR MARK III

- Status: Valid registration
- Airframe: [Couillard Michael R TWINSTAR MARK III](https://openairdocs.org/model/couillard-michael-r-twinstar-mark-iii) (registry code 05633UM, 2 seats)
- Engine: [Rotax UL-670 BH13](https://openairdocs.org/engine/rotax-ul-670-bh13) (registry code 55596)
- Serial number: M3-247
- Year built: 2015
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Kolb Aircraft Inc TWINSTAR MARK III
- Airworthiness: Experimental, amateur built
- Airworthiness date: October 25, 2018
- Certificate issued: September 27, 2017
- Expires: September 30, 2027
- Mode S code: A185A8
- Registered owner: [Gelbard Dustin S](https://openairdocs.org/faa-owner/GELBARD%20DUSTIN%20S)
- Location: [Simi Valley, CA](https://openairdocs.org/faa-place/CA/Simi%20Valley)
- Owner type: Individual
- Owner's area on the map: 34.2624° N, 118.7722° W: Placed by OpenAirDocs at the center of ZIP code 93065, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=1978M
- Page: https://openairdocs.org/aircraft/N1978M

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 (Couillard Michael R TWINSTAR MARK III)

None in force.

### Matched by engine (Rotax UL-670 BH13)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N1978M.

## FAA accident and incident reports

None matched to N1978M.

## 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 N1978M

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N1978M before.

- [Cancelled 2010-08-16](https://openairdocs.org/deregistered/N1978M-2010-08-16): Dehavilland TIGER MOTH DH 82A, S/N 042, built 1942. Exported to New Zealand. Owner: [Unknown, OK](https://openairdocs.org/faa-place/OK/Unknown)
- [Cancelled 1974-07-19](https://openairdocs.org/deregistered/N1978M-1974-07-19): Goodyear FG1D, S/N 3274, built 1944. Owner: [Tefft Arnold Robert](https://openairdocs.org/faa-owner/TEFFT%20ARNOLD%20ROBERT), [Westlake, OH](https://openairdocs.org/faa-place/OH/Westlake)

## Related

- Other Couillard Michael R TWINSTAR MARK III aircraft: https://openairdocs.org/model/couillard-michael-r-twinstar-mark-iii/aircraft.md
- The Rotax UL-670 BH13 engine: https://openairdocs.org/engine/rotax-ul-670-bh13.md

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