# N804DF: 2006 Robinson Helicopter R44 II, registration cancelled 2019-11-04

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 4, 2019
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Robinson Helicopter R44 II](https://openairdocs.org/model/robinson-helicopter-r44-ii) (registry code 7640122)
- Engine: [Continental IO-540 series](https://openairdocs.org/engine/continental-io-540-series) (registry code 17051)
- Data sheets: [TCDS H11NM](https://openairdocs.org/tcds/H11NM) (OpenAirDocs)
- Serial number: 11265
- Year built: 2006
- Type of aircraft: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: May 23, 2006
- Certificate issued: July 23, 2013
- Last registry action: July 28, 2016
- Mode S code: AAF10A
- Owner when cancelled: [Royal Aeronautical Services USA LLC](https://openairdocs.org/faa-owner/ROYAL%20AERONAUTICAL%20SERVICES%20USA%20LLC)
- Location: [Cheyenne, WY](https://openairdocs.org/faa-place/WY/Cheyenne)
- Owner type: LLC
- Owner's area on the map: 41.1001° N, 104.9249° W: Placed by OpenAirDocs at the center of ZIP code 82001, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N804DF
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=804DF
- Page: https://openairdocs.org/deregistered/N804DF-2019-11-04

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 R44 II: https://openairdocs.org/model/robinson-helicopter-r44-ii.md

## NTSB investigations (3)

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 GAA17CA165](https://openairdocs.org/ntsb/GAA17CA165), Feb 19, 2017: Robinson Helicopter R44 (N804DF), Spofford, TX, substantial damage. Probable cause: The pilot's decision to hover-taxi out of the hangar and his subsequent failure to maintain clearance from the hangar.
- [NTSB GAA15CA232](https://openairdocs.org/ntsb/GAA15CA232), Jul 16, 2015: Robinson Helicopter R44 II (N804DF), Prairie Lea, TX, substantial damage. Probable cause: The pilot's failure to maintain rotor rpm, resulting in an uncontrolled descent and collision with trees.
- [NTSB DFW08CA177](https://openairdocs.org/ntsb/DFW08CA177), Jul 5, 2008: Robinson R44 II (N804DF), Canyon Lake, TX, substantial damage. Probable cause: A total loss of tail rotor effectiveness. Contributing to the accident was the pilot's improper decision to operate inside the height velocity curve.

## FAA accident and incident reports (3)

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 20170219001049A](https://openairdocs.org/incident/20170219001049A), Feb 19, 2017: Robinson Helicopter Company R44 II (N804DF), Spofford, TX, Substantial damage. Airman hovered an R-44 helicopter inside a hangar with the intent of repositioning outside the hangar for a flight to another airfield. Aircraft rotor system…
- [Accident 20150716014379A](https://openairdocs.org/incident/20150716014379A), Jul 16, 2015: Robinson Helicopter Company R44 II (N804DF), Fentress, TX, Substantial damage. After conducting a downwind manuvering turn the low rotor RPM alert came on. Due to low altitude the pilot was unable to recover and made a hard landing from…
- [Accident 20080705839879A](https://openairdocs.org/incident/20080705839879A), Jul 5, 2008: Robsin R44RAVENII (N804DF), Spring Branch, TX, Substantial damage. (-23) On July 5, 2008, at approximately 1600 CDT, a Robinson R44 helicopter, N804DF, sustained substantial damage when it landed hard after loss of tail rotor…

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