# N121MR: 1985 Robinson Helicopter R22 ALPHA, registration cancelled 2018-04-04

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 4, 2018
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Robinson Helicopter R22 ALPHA](https://openairdocs.org/model/robinson-helicopter-r22-alpha) (registry code 7640104)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Data sheets: [TCDS H10WE](https://openairdocs.org/tcds/H10WE) (OpenAirDocs)
- Serial number: 0496
- Year built: 1985
- Type of aircraft: Rotorcraft
- Airworthiness: Standard, normal
- Airworthiness date: July 17, 1985
- Certificate issued: July 9, 2009
- Last registry action: September 10, 2014
- Mode S code: A0588C
- Owner when cancelled: [Castor Aviation Ltd](https://openairdocs.org/faa-owner/CASTOR%20AVIATION%20LTD)
- Location: [Wasilla, AK](https://openairdocs.org/faa-place/AK/Wasilla)
- Owner type: Corporation
- Owner's area on the map: 61.6051° N, 149.4227° W: Placed by OpenAirDocs at the center of ZIP code 99654, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N121MR
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=121MR
- Page: https://openairdocs.org/deregistered/N121MR-2018-04-04

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 Robinson Helicopter R22 ALPHA: https://openairdocs.org/model/robinson-helicopter-r22-alpha.md

## NTSB investigations (2)

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 ANC17LA013](https://openairdocs.org/ntsb/ANC17LA013), Dec 18, 2016: Robinson Helicopter R22 (N121MR), Palmer, AK, substantial damage. Probable cause: The pilot's failure to maintain main rotor revolutions per minute (RPM) during a pinnacle landing, which resulted in a main rotor stall condition, a loss of control, and a subsequent impact with…
- [NTSB ANC12CA032](https://openairdocs.org/ntsb/ANC12CA032), Apr 21, 2012: Robinson Helicopter R22 Alpha (N121MR), Palmer, AK, substantial damage. Probable cause: The pilot's selection of unsuitable terrain for landing, which resulted in a tailrotor strike.

## FAA accident and incident reports (2)

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 20161218022589A](https://openairdocs.org/incident/20161218022589A), Dec 18, 2016: Robinson Helicopter R22 ALPHA (N121MR), Hatcher Pass, AK, Substantial damage. Rotor RPM decayed on approach to pinnacle, aircraft settled on steep terrain. Tail rotor struck hill and the tail boom seperated from the aircraft. The…
- [Accident 20120421007209A](https://openairdocs.org/incident/20120421007209A), Apr 21, 2012: Robinson Helicopter R22 ALPHA (N121MR), Palmer, AK, Substantial damage. Pilot landed off airport in the snow. When collective was reduced a/c tilted to the rear. When pilot picked up the a/c the tail rotor struck the snow.

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