# N51HH: Henderson Harley L HLH RV-4, registration cancelled 1989-07-22

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 22, 1989
- Status when cancelled: Triennial form not returned
- Airframe: [Henderson Harley L HLH RV-4](https://openairdocs.org/model/henderson-harley-l-hlh-rv-4) (registry code 056084W)
- Serial number: H00186
- Type of aircraft: Fixed wing single engine
- Mode S code: A65FCD
- The mark today: https://openairdocs.org/aircraft/N51HH
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=51HH
- Page: https://openairdocs.org/deregistered/N51HH-1989-07-22

From the FAA registry file of November 5, 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 Henderson Harley L HLH RV-4: https://openairdocs.org/model/henderson-harley-l-hlh-rv-4.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 MIA88LA148](https://openairdocs.org/ntsb/MIA88LA148), Apr 15, 1988: Henderson RV-4 (N51HH), Defuniak Sprngs, FL, substantial damage

## Other aircraft with N51HH

- [Registered now](https://openairdocs.org/aircraft/N51HH): Hawker Beechcraft HAWKER 900XP, S/N HA-0169, built 2010
- [Cancelled 2005-03-04](https://openairdocs.org/deregistered/N51HH-2005-03-04): Agusta A109E, S/N 11621, built 2004. Exported to Brazil. Owner: [Xxx, OK](https://openairdocs.org/faa-place/OK/Xxx)

---
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.