# N56MU: 1984 Robinson Helicopter R22 ALPHA, registration cancelled 2017-05-23

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 23, 2017
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Robinson Helicopter R22 ALPHA](https://openairdocs.org/model/robinson-helicopter-r22-alpha) (registry code 7640104)
- Engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508)
- Data sheets: [TCDS H10WE](https://openairdocs.org/tcds/H10WE), [TCDS E-274](https://openairdocs.org/tcds/E-274) (OpenAirDocs)
- Serial number: 0458
- Year built: 1984
- Type of aircraft: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: December 14, 1984
- Certificate issued: June 17, 2002
- Last registry action: June 17, 2008
- Mode S code: A725B7
- Owner when cancelled: [Firefly Leasing Inc](https://openairdocs.org/faa-owner/FIREFLY%20LEASING%20INC)
- Location: [South Carver, MA](https://openairdocs.org/faa-place/MA/South%20Carver)
- Owner type: Corporation
- Owner's area on the map: 41.8488° N, 70.6612° W: Placed by OpenAirDocs at the center of ZIP code 02366, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N56MU
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=56MU
- Page: https://openairdocs.org/deregistered/N56MU-2017-05-23

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 (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 NYC03CA207](https://openairdocs.org/ntsb/NYC03CA207), Sep 28, 2003: Robinson R-22A (N56MU), Bedford, MA, substantial damage. Probable cause: The certified flight instructor's failure to maintain ground clearance and his delayed remedial action, which resulted in a rollover.

## 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 20030928024339A](https://openairdocs.org/incident/20030928024339A), Sep 28, 2003: Robsin R22ALPHA (N56MU), Bedford, MA, Substantial damage. (-23) N56MU, R-22-alpha, while doing hover work over whiskey taxiway caught its skid in the high grass/dirt that resulted in a dynamic rollover at Bedford…

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.