# Jeffrey T Gilbert COZY MARK IV

- Type: Aircraft model (FAA registry)
- Registry code: 05639TH
- Manufacturer (registry): JEFFREY T GILBERT
- Model: COZY MARK IV
- Aircraft type: Fixed wing single engine
- Category: Airplane
- Engines: 1 · Reciprocating
- Seats: 4
- Weight class: Up to 12,499 lb
- Certification: Not type certificated
- Registered aircraft: 1
- Page: https://openairdocs.org/model/jeffrey-t-gilbert-cozy-mark-iv

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

None matched.

## Registered aircraft (1)

- [N357BU](https://openairdocs.org/aircraft/N357BU): [Gilbert Jeffrey T](https://openairdocs.org/faa-owner/GILBERT%20JEFFREY%20T), [Tucson, AZ](https://openairdocs.org/faa-place/AZ/Tucson), built 2023, S/N 0357

## NTSB investigations

None matched to aircraft with this model.

## 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.

- [Incident 20260213000539I](https://openairdocs.org/incident/20260213000539I), Feb 13, 2026: Jeffrey T Gilbert COZY MARK IV (N357BU), Yuma, AZ, No damage. The pilot was repositioning the aircraft from kryn to knyl. During the descent into knyl, while reducing engine RPM to slow for landing, the engine began…

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Co-Z Development COZY MARK IV](https://openairdocs.org/model/co-z-development-cozy-mark-iv): 2 registered aircraft, registry code 05612CJ
- [Goodier G W/Goodier C M COZY MARK IV](https://openairdocs.org/model/goodier-g-w-goodier-c-m-cozy-mark-iv): 1 registered aircraft, registry code 056023A
- [Jones Timothy P COZY MARK IV](https://openairdocs.org/model/jones-timothy-p-cozy-mark-iv): 1 registered aircraft, registry code 05602PM
- [Pitzer D A/Pitzer P L COZY MARK IV](https://openairdocs.org/model/pitzer-d-a-pitzer-p-l-cozy-mark-iv): 1 registered aircraft, registry code 05603ZJ
- [Magill Stanley J COZY MARK IV](https://openairdocs.org/model/magill-stanley-j-cozy-mark-iv): 1 registered aircraft, registry code 056054D
- [Staben Jon C COZY MARK IV](https://openairdocs.org/model/staben-jon-c-cozy-mark-iv): 1 registered aircraft, registry code 05605GM
- [Richards Edmond A COZY MARK IV](https://openairdocs.org/model/richards-edmond-a-cozy-mark-iv): 1 registered aircraft, registry code 056068B
- [Fagerberg John COZY MARK IV](https://openairdocs.org/model/fagerberg-john-cozy-mark-iv): 1 registered aircraft, registry code 05606TE
- [Laundrie Kenneth COZY MARK IV](https://openairdocs.org/model/laundrie-kenneth-cozy-mark-iv): 1 registered aircraft, registry code 05607XE
- [Parmelee M/Parmelee N COZY MARK IV](https://openairdocs.org/model/parmelee-m-parmelee-n-cozy-mark-iv): 1 registered aircraft, registry code 05607XT
- [Cruger D J/Cruger L L COZY MARK IV](https://openairdocs.org/model/cruger-d-j-cruger-l-l-cozy-mark-iv): 1 registered aircraft, registry code 056101G
- [Stowitts Paul T COZY MARK IV](https://openairdocs.org/model/stowitts-paul-t-cozy-mark-iv): 1 registered aircraft, registry code 05610JA

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