# N4903S: 1984 Lang John F CGS HAWK

- Status: Valid registration
- Airframe: [Lang John F CGS HAWK](https://openairdocs.org/model/lang-john-f-cgs-hawk) (registry code 05675TN, 1 seats)
- Engine: [Kawasaki ALL MDLS A/B](https://openairdocs.org/engine/kawasaki-all-mdls-a-b) (registry code 35500)
- Serial number: 359
- Year built: 1984
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: November 5, 1984
- Certificate issued: May 1, 1984
- Expires: June 30, 2027
- Mode S code: A612EA
- Registered owner: [Lang John F](https://openairdocs.org/faa-owner/LANG%20JOHN%20F)
- Location: [Alma, MI](https://openairdocs.org/faa-place/MI/Alma)
- Owner type: Individual
- Owner's area on the map: 43.3784° N, 84.6760° W: Placed by OpenAirDocs at the center of ZIP code 48801, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4903S
- Page: https://openairdocs.org/aircraft/N4903S

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 (Lang John F CGS HAWK)

None in force.

### Matched by engine (Kawasaki ALL MDLS A/B)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N4903S.

## FAA accident and incident reports

None matched to N4903S.

## 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 Lang John F CGS HAWK aircraft: https://openairdocs.org/model/lang-john-f-cgs-hawk/aircraft.md
- The Kawasaki ALL MDLS A/B engine: https://openairdocs.org/engine/kawasaki-all-mdls-a-b.md

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