# N999HG: 1974 Gates Lear Jet 25B, registration cancelled 2013-06-10

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: June 10, 2013
- Status when cancelled: Sale reported, canceled
- Airframe: [Gates Lear Jet 25B](https://openairdocs.org/model/gates-lear-jet-25b) (registry code 5170511)
- Engine: [GE CJ610-SER series](https://openairdocs.org/engine/ge-cj610-ser-series) (registry code 30006)
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE), [TCDS 1E16](https://openairdocs.org/tcds/1E16) (OpenAirDocs)
- Serial number: 178
- Year built: 1974
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-jet
- Airworthiness: Standard
- Last registry action: March 12, 1983
- Mode S code: ADF4C8
- Location: [Okla City, OK](https://openairdocs.org/faa-place/OK/Okla%20City)
- Owner type: Individual
- Owner's area on the map: 35.4676° N, 97.5164° W: Placed by OpenAirDocs: center of Oklahoma City, OK, within about 14 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N999HG
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=999HG
- Page: https://openairdocs.org/deregistered/N999HG-2013-06-10

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 Gates Lear Jet 25B: https://openairdocs.org/model/gates-lear-jet-25b.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 IAD77AA065](https://openairdocs.org/ntsb/IAD77AA065), Sep 8, 1977: Learjet 25B (N999HG), Sanford, NC, destroyed, 5 fatal

## 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 19770908043549A](https://openairdocs.org/incident/19770908043549A), Sep 8, 1977: Lear 25B (N999HG), NC, Destroyed

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