# N404MK: 2003 Learjet 45, registration cancelled 2006-09-01

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: September 1, 2006
- Exported to: Argentina
- Status when cancelled: Valid registration
- Airframe: [Learjet 45](https://openairdocs.org/model/learjet-45) (registry code 5170805)
- Engine: [Honeywell TFE-731-SER series](https://openairdocs.org/engine/honeywell-tfe-731-ser-series) (registry code 33902)
- Data sheets: [TCDS T00008WI](https://openairdocs.org/tcds/T00008WI) (OpenAirDocs)
- Serial number: 2003
- Year built: 2003
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: January 7, 2004
- Certificate issued: May 9, 2006
- Last registry action: May 9, 2006
- Mode S code: A4BC9A
- Owner when cancelled: [Jet Best LLC](https://openairdocs.org/faa-owner/JET%20BEST%20LLC)
- Location: [Fort Lauderdale, FL](https://openairdocs.org/faa-place/FL/Fort%20Lauderdale)
- Owner type: Corporation
- Owner's area on the map: 26.1860° N, 80.1727° W: Placed by OpenAirDocs at the center of ZIP code 33309, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N404MK
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=404MK
- Page: https://openairdocs.org/deregistered/N404MK-2006-09-01

From the FAA registry file of November 3, 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 45: https://openairdocs.org/model/learjet-45.md

## Service difficulty reports (1)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR KW32004F00000](https://openairdocs.org/sdr/KW32004F00000), Apr 1, 2004: SQUAT SWITCH. INOPERATIVE. DURING ROUTINE MAINTENANCE, IT WAS DISCOVERED THAT ONE EACH SET SCREW MISSING FROM LT OB, RT IB, AND RT OB LEVER ARMS AND 2 EACH SET SCREWS MISSING FROM LT IB L

---
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.