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Registered aircraft · FAA record as of November 9, 2026Hiller HH-120
N3781G is a Hiller HH-120, a rotorcraft with a piston engine (a helicopter or multicopter), built in 1953. It has 1 seat. It is registered to Classic Rotors Museum, a corporation in Ramona, California. The registration is valid: it was issued on June 2, 2004 and expires on August 31, 2027. It holds an experimental airworthiness certificate for exhibition, dated June 4, 2004.
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Flight history: where it flew in the last seven days · follow it on the live map
Aircraft
- Maker
- Hiller
- Model
- HH-120
- Serial number
- 534663
- Type
- RotorcraftFAA type of aircraft code 6 (the FAA's broad category for the airframe). Every aircraft with this code · All codes
- Power
- Piston (reciprocating)FAA type of engine code 1 (what powers it, as the FAA classes engines). Every aircraft with this code · All codes, 1 motor · Hiller 8RJ2B · 4 hp
- Fuel
- 100LL avgas
- Seats
- 1
- Year built
- 1953
- Cruising speed
- 99 mph
- Transponder code
- A45405 (octal 51052005)
Registration
- Status
- Valid registrationFAA registration status code V (whether the registration certificate is in force). Every aircraft with this code · All codes
- Certificate issued
- June 2, 2004
- Expires
- August 31, 2027
- Last FAA action
- March 10, 2023
- Airworthiness
- ExperimentalFAA airworthiness class code 4 (the kind of airworthiness certificate it flies under and what it is approved for). Every aircraft with this code · All codes · ExhibitionFAA certificate purpose code 3 (the kind of airworthiness certificate it flies under and what it is approved for). All codes · June 4, 2004
- FAA region
- Western-PacificFAA region code 4 (the FAA regional office that handles the record). All codes
- FAA record id
- 00510164
Owner as the FAA publishes it
- Name
- Classic Rotors Museum
- Type
- CorporationFAA type of owner code 3 (who holds the registration: a person, a company, a trust or a government body). Every aircraft with this code · All codes
- Address
- 2690 Montecito Rd
Ramona, CA 92065-1611
Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.
Documents on file 0
No bills of sale, loans or other documents are indexed against this tail number.
Connections how N3781G links to the rest of the register
- Hiller 242 aircraft on the register
- Hiller 8RJ2B 3 aircraft with this engine series · 4 hp
- Classic Rotors Museum 26 aircraft in the fleet
- Ramona, CA 101 aircraft registered in this town
- Ramona Airport · RNM
- California 28,112 aircraft registered
The whole map of how records connect · these connections as data: /graph/aircraft/N3781G.json.
Records check free · 1 to understand · 4 clear
The public federal record on N3781G, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.
Valid registration to Classic Rotors Museum, a corporation, certificate issued June 2, 2004, expires August 31, 2027. No fractional interest recorded. [1]
The airworthiness certificate on file is dated June 4, 2004, 51 years after the 1953 manufacture year. A re-issued certificate commonly follows export and re-import, a rebuild, or a return to the register after cancellation. The cause is documented in the FAA aircraft records file, which the full report obtains. [1]
No earlier tail number is recorded against serial 534663 for this model in the deregistered file. [2]
No other airframe has carried N3781G according to the deregistered file. [2]
No bills of sale, loans or releases have reached the registry in recent weeks. The index covers only recent filings; older liens are in the records file. [3]
No NTSB investigation records located under N3781G. CLEAR means the query ran and returned nothing, not that nothing ever happened. [4]
These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
- FAA Releasable Aircraft Database, master file, file of November 9, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of November 9, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of November 9, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through October 28, 2026. data.ntsb.gov/carol-main-public/basic-search
This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, November 9, 2026. See this record on the FAA site · This record as data