# N331PF: 2021 John Preston Ruth HUMMINGBIRD 300L

- Status: Valid registration
- Airframe: [John Preston Ruth HUMMINGBIRD 300L](https://openairdocs.org/model/john-preston-ruth-hummingbird-300l) (registry code 05639Y5, 4 seats)
- Engine: [Continental IO-540 series](https://openairdocs.org/engine/continental-io-540-series) (registry code 17051)
- Serial number: 1907
- Year built: 2021
- Type: Rotorcraft
- Engine type: Reciprocating
- Kit: Vertical Aviation Technologies HUMMINGBIRD 300L
- Airworthiness: Experimental, amateur built
- Airworthiness date: May 13, 2021
- Certificate issued: February 12, 2021
- Expires: February 29, 2028
- Mode S code: A39AD1
- Registered owner: [Ruth John P](https://openairdocs.org/faa-owner/RUTH%20JOHN%20P)
- Location: [New Hill, NC](https://openairdocs.org/faa-place/NC/New%20Hill)
- Owner type: Individual
- Owner's area on the map: 35.6420° N, 78.9756° W: Placed by OpenAirDocs at the center of ZIP code 27562, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=331PF
- Page: https://openairdocs.org/aircraft/N331PF

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Continental IO-540 model are included.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (John Preston Ruth HUMMINGBIRD 300L)

None in force.

### Matched by engine (Continental IO-540 series)

None in force.

## Information bulletins (advisory)

None matched.

## 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 ERA24LA244](https://openairdocs.org/ntsb/ERA24LA244), Jun 1, 2024: Ruth Hummingbird (N331PF), New Hill, NC, substantial damage. Probable cause: The pilot's failure to maintain control of the helicopter while hovering.

## 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 20240531019879A](https://openairdocs.org/incident/20240531019879A), May 31, 2024: John Preston Ruth HUMMINGBIRD 300L (N331PF), New Hill, NC, Substantial damage. During sequential hovering to track main rotor blades, aircraft was difficult to control. PIC reported cyclic moving in a semicircular motion periodically in a…

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other John Preston Ruth HUMMINGBIRD 300L aircraft: https://openairdocs.org/model/john-preston-ruth-hummingbird-300l/aircraft.md
- The Continental IO-540 series engine: https://openairdocs.org/engine/continental-io-540-series.md

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