# N234MH: Hammond Mark O MH 1

- Status: Valid registration
- Airframe: [Hammond Mark O MH 1](https://openairdocs.org/model/hammond-mark-o-mh-1) (registry code 056068U, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 001
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: March 2, 2002
- Certificate issued: October 14, 2023
- Expires: October 31, 2030
- Mode S code: A21877
- Registered owner: [Gengenbach Joseph A](https://openairdocs.org/faa-owner/GENGENBACH%20JOSEPH%20A)
- Location: [Collinsville, TX](https://openairdocs.org/faa-place/TX/Collinsville)
- Owner type: Individual
- Owner's area on the map: 33.5427° N, 96.8948° W: Placed by OpenAirDocs at the center of ZIP code 76233, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=234MH
- Page: https://openairdocs.org/aircraft/N234MH

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 (Hammond Mark O MH 1)

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 SEA08CA153](https://openairdocs.org/ntsb/SEA08CA153), Jun 19, 2008: Hammond MH1 (N234MH), McCall, ID, substantial damage. Probable cause: The pilot's failure to maintain directional control during the landing roll, resulting in a inadvertent ground loop. Contributing to the accident were variable winds that resulted in a landing…

## 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 20080619838549A](https://openairdocs.org/incident/20080619838549A), Jun 19, 2008: Hammon MH1 (N234MH), Mc Call, ID, Substantial damage. (-23) During landing at mccall, ID, the pilot lost directional control of the aircraft and ground looped, causing damage to the right main landing gear and the…

## 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 Hammond Mark O MH 1 aircraft: https://openairdocs.org/model/hammond-mark-o-mh-1/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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