# N85Z: Siewert Irving OSPREY GP-4, registration cancelled 1995-05-22

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 22, 1995
- Status when cancelled: Triennial form not returned
- Airframe: [Siewert Irving OSPREY GP-4](https://openairdocs.org/model/siewert-irving-osprey-gp-4) (registry code 95708CR)
- Serial number: 125
- Type of aircraft: Fixed wing single engine
- Certificate issued: April 21, 1992
- Last registry action: March 16, 1995
- Mode S code: ABA73E
- Owner when cancelled: [Siewert Irving H](https://openairdocs.org/faa-owner/SIEWERT%20IRVING%20H)
- Location: [Canon City, CO](https://openairdocs.org/faa-place/CO/Canon%20City)
- Owner type: Individual
- Owner's area on the map: 38.5424° N, 105.4235° W: Placed by OpenAirDocs at the center of ZIP code 81212, within about 15 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N85Z
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=85Z
- Page: https://openairdocs.org/deregistered/N85Z-1995-05-22

From the FAA registry file of October 29, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Siewert Irving OSPREY GP-4: https://openairdocs.org/model/siewert-irving-osprey-gp-4.md

## 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 DEN93LA069](https://openairdocs.org/ntsb/DEN93LA069), Jun 25, 1993: Irving Siewert Osprey GP-4 (N85Z), Canon City, CO, destroyed, 1 fatal. Probable cause: FAILURE BY THE PILOT/BUILDER TO FOLLOW CONSTRUCTION SPECIFICATIONS AND THE USE OF IMPROPER MATERIALS DURING CONSTRUCTION OF THE AIRCRAFT.

## 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 19930625020439A](https://openairdocs.org/incident/19930625020439A), Jun 25, 1993: Ogden OSPREY (N85Z), Canon City, CO, Destroyed, 1 fatal. Broke up inflight. Canopy horizontal stabilizer separated. Bogas latch and plexiglass used. Canopy hit stabilizer.

## Other aircraft with N85Z

- [Cancelled 2000-05-11](https://openairdocs.org/deregistered/N85Z-2000-05-11): Huber James M ROTORDYNE 200, S/N 001. Owner: [Huber James M](https://openairdocs.org/faa-owner/HUBER%20JAMES%20M), [Kent, WA](https://openairdocs.org/faa-place/WA/Kent)
- [Cancelled 1989-03-03](https://openairdocs.org/deregistered/N85Z-1989-03-03): Bell 47G-2, S/N 1241. N-number assigned, not yet registered

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