# N5597N: 1980 Hoffman Edward C. X4

- Status: Valid registration
- Airframe: [Hoffman Edward C. X4](https://openairdocs.org/model/hoffman-edward-c-x4) (registry code 9570608, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 1
- Year built: 1980
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: January 12, 1981
- Certificate issued: November 9, 2011
- Expires: November 30, 2027
- Mode S code: A72434
- Registered owner: [Hoffman Edward C](https://openairdocs.org/faa-owner/HOFFMAN%20EDWARD%20C)
- Location: [Tarpon Springs, FL](https://openairdocs.org/faa-place/FL/Tarpon%20Springs)
- Owner type: Individual
- Owner's area on the map: 28.1432° N, 82.6839° W: Placed by OpenAirDocs at the center of ZIP code 34688, 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=5597N
- Page: https://openairdocs.org/aircraft/N5597N

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 (Hoffman Edward C. X4)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N5597N.

## FAA accident and incident reports

None matched to N5597N.

## 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 N5597N

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N5597N before.

- [Cancelled 1972-02-25](https://openairdocs.org/deregistered/N5597N-1972-02-25): Boeing E75, S/N 75-8134. Owner: [Mcnabb Joel E](https://openairdocs.org/faa-owner/MCNABB%20JOEL%20E), [Manvel, TX](https://openairdocs.org/faa-place/TX/Manvel)

## Related

- Other Hoffman Edward C. X4 aircraft: https://openairdocs.org/model/hoffman-edward-c-x4/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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