# N687HZ: 2009 Kerr John HATZ CLASSIC

- Status: Valid registration
- Airframe: [Kerr John HATZ CLASSIC](https://openairdocs.org/model/kerr-john-hatz-classic) (registry code 056278E, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 687
- Year built: 2009
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: April 22, 2009
- Certificate issued: January 17, 2024
- Expires: January 31, 2031
- Mode S code: A91DFF
- Registered owner: [Brown Verne L](https://openairdocs.org/faa-owner/BROWN%20VERNE%20L)
- Location: [Ennis, MT](https://openairdocs.org/faa-place/MT/Ennis)
- Owner type: Individual
- Owner's area on the map: 45.3245° N, 111.6512° W: Placed by OpenAirDocs at the center of ZIP code 59729, within about 12 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=687HZ
- Page: https://openairdocs.org/aircraft/N687HZ

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 (Kerr John HATZ CLASSIC)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR23LA354](https://openairdocs.org/ntsb/WPR23LA354), Apr 29, 2023: Kerr John Hatz Classic (N687HZ), Ennis, MT, substantial damage. Probable cause: The pilot’s failure to maintain directional control during the landing roll which resulted in a ground-loop.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20230428018639A](https://openairdocs.org/incident/20230428018639A), Apr 28, 2023: Kerr John HATZ CLASSIC (N687HZ), Ennis, MT, Substantial damage. Description of the deviation: While operating a Hatz Classic experimental biplane on a VFR flight plan and upon landing on rwy 16 at the Ennis, MT airport…

## 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 Kerr John HATZ CLASSIC aircraft: https://openairdocs.org/model/kerr-john-hatz-classic/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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