# N40LB: 1968 Learjet 25, registration cancelled 1974-03-01

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: March 1, 1974
- Status when cancelled: Valid registration
- Airframe: [Learjet 25](https://openairdocs.org/model/learjet-25) (registry code 5170506)
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE) (OpenAirDocs)
- Serial number: 25-009
- Year built: 1968
- Type of aircraft: Fixed wing multi engine
- Certificate issued: September 19, 1973
- Mode S code: A4AB44
- Owner when cancelled: [Lisa Jet Inc](https://openairdocs.org/faa-owner/LISA%20JET%20INC)
- Location: [Atlanta, GA](https://openairdocs.org/faa-place/GA/Atlanta)
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N40LB
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=40LB
- Page: https://openairdocs.org/deregistered/N40LB-1974-03-01

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 Learjet 25: https://openairdocs.org/model/learjet-25.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 MKC74AK012](https://openairdocs.org/ntsb/MKC74AK012), Sep 25, 1973: Gates Lear 25 (N40LB), Lincoln, NE, destroyed, 3 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 19730925042139A](https://openairdocs.org/incident/19730925042139A), Sep 25, 1973: Lear 25 (N40LB), Lincoln, NE, Destroyed, 1 fatal. Plt rated in model previous day.

## Other aircraft with N40LB

- [Registered now](https://openairdocs.org/aircraft/N40LB): Dassault FALCON 900EX, S/N 272, built 2013
- [Cancelled 2012-08-22](https://openairdocs.org/deregistered/N40LB-2012-08-22): North American NA-265-40, S/N 282-36, built 1965. Registration expired, pending cancellation. Owner: [Commercial Avn Enterpr Inc](https://openairdocs.org/faa-owner/COMMERCIAL%20AVN%20ENTERPR%20INC), [Boca Raton, FL](https://openairdocs.org/faa-place/FL/Boca%20Raton)

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