# N6637N: Hughes OH-6A

- Status: Valid registration
- Airframe: [Hughes OH-6A](https://openairdocs.org/model/hughes-oh-6a) (registry code 4470905, 4 seats)
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE) (MD Helicopters LLC) (OpenAirDocs)
- Serial number: 6716590
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Certificate issued: August 3, 2011
- Expires: August 31, 2027
- Mode S code: A8C2B8
- Registered owner: [Usda Aphis Ws Atoc](https://openairdocs.org/faa-owner/USDA%20APHIS%20WS%20ATOC)
- Location: [Cedar City, UT](https://openairdocs.org/faa-place/UT/Cedar%20City)
- Owner type: Government
- Owner's area on the map: 37.7687° N, 113.1336° W: Placed by OpenAirDocs at the center of ZIP code 84721, within about 8 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=6637N
- Page: https://openairdocs.org/aircraft/N6637N

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 (Hughes OH-6A)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N6637N.

## FAA accident and incident reports

None matched to N6637N.

## 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 N6637N

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N6637N before.

- [Cancelled 1952-07-15](https://openairdocs.org/deregistered/N6637N-1952-07-15): Taylorcraft 19, S/N 4-13037, built 1952. Exported to Colombia. Owner: [Taylorcraft Inc](https://openairdocs.org/faa-owner/TAYLORCRAFT%20INC), [Conway, PA](https://openairdocs.org/faa-place/PA/Conway)

## Related

- Other Hughes OH-6A aircraft: https://openairdocs.org/model/hughes-oh-6a/aircraft.md

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