# N90HS: 2013 Seidel Howard CLASSIC 4

- Status: Valid registration
- Airframe: [Seidel Howard CLASSIC 4](https://openairdocs.org/model/seidel-howard-classic-4) (registry code 056152J, 2 seats)
- Engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572)
- Serial number: C9710-0210
- Year built: 2013
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Kit: Skystar Acft Co KITFOX CLASSIC IV
- Airworthiness: Experimental, amateur built
- Airworthiness date: April 13, 2013
- Certificate issued: September 22, 2003
- Expires: May 31, 2028
- Mode S code: AC6D93
- Owner type: Individual
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=90HS
- Page: https://openairdocs.org/aircraft/N90HS

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 912ULS model are included.

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

### Matched by airframe (Seidel Howard CLASSIC 4)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N90HS.

## FAA accident and incident reports

None matched to N90HS.

## 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 N90HS

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N90HS before.

- [Cancelled 2000-12-06](https://openairdocs.org/deregistered/N90HS-2000-12-06): Stanton PITTS S-1S, S/N 7-0233. Triennial form not returned. Owner: [Owens Jim](https://openairdocs.org/faa-owner/OWENS%20JIM), [Frierson, LA](https://openairdocs.org/faa-place/LA/Frierson)
- [Cancelled 1991-12-13](https://openairdocs.org/deregistered/N90HS-1991-12-13): Holman H L/Sears H O HS 1, S/N HS001. Triennial form not returned. Owner: [Holman Howard L](https://openairdocs.org/faa-owner/HOLMAN%20HOWARD%20L), [Riverside, CA](https://openairdocs.org/faa-place/CA/Riverside)

## Related

- Other Seidel Howard CLASSIC 4 aircraft: https://openairdocs.org/model/seidel-howard-classic-4/aircraft.md
- The Rotax 912ULS series engine: https://openairdocs.org/engine/rotax-912uls-series.md

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