# N331DP: Learjet 23, registration cancelled 1990-10-22

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: October 22, 1990
- Status when cancelled: N-number assigned, not yet registered
- Airframe: [Learjet 23](https://openairdocs.org/model/learjet-23) (registry code 5170102)
- Data sheets: [TCDS A5CE](https://openairdocs.org/tcds/A5CE) (OpenAirDocs)
- Serial number: 23067
- Type of aircraft: Fixed wing multi engine
- Mode S code: A399DF
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N331DP
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=331DP
- Page: https://openairdocs.org/deregistered/N331DP-1990-10-22

From the FAA registry file of October 28, 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 23: https://openairdocs.org/model/learjet-23.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 ATL90MA051](https://openairdocs.org/ntsb/ATL90MA051), Jan 18, 1990: Learjet 23 (N331DP), Ansonia, OH, destroyed, 2 fatal. Probable cause: THE FLIGHT CREW BECAME INCAPACITATED FOR UNDETERMINED REASONS AND LOST CONTROL OF THE AIRPLANE.

## 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 19900118000659A](https://openairdocs.org/incident/19900118000659A), Jan 18, 1990: Lear 23LEAR (N331DP), Ansonia, OH, Destroyed, 2 fatal. Crashed and burned. ATC reported pilots speech slurred. Read back on vector headings incorrect according to ATC.

## Other aircraft with N331DP

- [Registered now](https://openairdocs.org/aircraft/N331DP): Beech 35-C33, S/N CD-954, built 1965
- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N331DP-undated): Learjet 23, S/N 23059. N-number assigned, not yet registered

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