# N999MF: 1969 Learjet 25, registration cancelled 2020-04-21

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 21, 2020
- Status when cancelled: First renewal notice
- Airframe: [Learjet 25](https://openairdocs.org/model/learjet-25) (registry code 5170506)
- 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: 050
- Year built: 1969
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-jet
- Airworthiness: Restricted, aerial surveying
- Airworthiness date: February 28, 2006
- Certificate issued: June 1, 2009
- Last registry action: April 11, 2017
- Mode S code: ADF52B
- Owner when cancelled: [Ice Niner LLC](https://openairdocs.org/faa-owner/ICE%20NINER%20LLC)
- Location: [Boulder, CO](https://openairdocs.org/faa-place/CO/Boulder)
- Owner type: LLC
- Owner's area on the map: 40.0457° N, 105.2009° W: Placed by OpenAirDocs at the center of ZIP code 80301, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N999MF
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=999MF
- Page: https://openairdocs.org/deregistered/N999MF-2020-04-21

From the FAA registry file of November 7, 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

## Service difficulty reports (1)

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

- [SDR X5E2003F00000](https://openairdocs.org/sdr/X5E2003F00000), Sep 15, 2003: WINDSHIELD. FAILED. LEFT WINDSHIELD WAS REPLACED WITH A PMA PART ON 12/8/1999. ON 7/3/2001 A BLISTER/ BUBBLE HAD FORMED IN THE INNER PLY AND WAS POLISHED OUT BY THE WINDOW MANUFACT

## FAA accident and incident reports (2)

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.

- [Incident 19921022049599I](https://openairdocs.org/incident/19921022049599I), Oct 22, 1992: Lear 25D (N999MF), Nashville, TN, Minor damage. Right engine had a compressor stall on climb. Flamed out. Restarted at a lower altitude. Continued to destination.
- [Incident 19811217088669I](https://openairdocs.org/incident/19811217088669I), Dec 17, 1981: Lear 24B (N999MF), Van Nuys, CA, Minor damage. After touchdown nose wheel castered, aircraft veered off runway. Nose wheel strut was defected.

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