# N991TD: 1966 Learjet 24, registration cancelled 2012-07-20

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 20, 2012
- Exported to: Malaysia
- Status when cancelled: Valid registration
- Airframe: [Learjet 24](https://openairdocs.org/model/learjet-24) (registry code 5170302)
- 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: 24-124
- Year built: 1966
- Type of aircraft: Fixed wing multi engine
- Engine type: Turbo-jet
- Airworthiness: Standard, transport
- Airworthiness date: June 5, 1996
- Certificate issued: December 19, 2007
- Last registry action: December 19, 2007
- Mode S code: ADD807
- Owner when cancelled: [Envoy Air Services LLC](https://openairdocs.org/faa-owner/ENVOY%20AIR%20SERVICES%20LLC)
- Location: [Leipsic, OH](https://openairdocs.org/faa-place/OH/Leipsic)
- Owner type: Corporation
- Owner's area on the map: 41.1118° N, 83.9998° W: Placed by OpenAirDocs at the center of ZIP code 45856, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N991TD
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=991TD
- Page: https://openairdocs.org/deregistered/N991TD-2012-07-20

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 24: https://openairdocs.org/model/learjet-24.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 X5C2003F00000](https://openairdocs.org/sdr/X5C2003F00000), Jan 31, 2003: FILTER ELEMENT. DIRTY. DURING SCHEDULED MAINTNANCE, REPLACED MAIN FUEL FILTERS WITH ELEMENTS. EXPERENCED LOW FUEL PRESSURE LIGHT AT HIGH ENGINE POWER SETTINGS WITH JET PUMP OPERATION.

## 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 CHI97LA053](https://openairdocs.org/ntsb/CHI97LA053), Jan 16, 1997: Learjet 24 (N991TD), Muscatine, IA, substantial damage. Probable cause: the pilot's failure to maintain directional control. A factor was the snow covered runway edge.

## 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 19970116000519A](https://openairdocs.org/incident/19970116000519A), Jan 16, 1997: Lear 24 (N991TD), Muscatine, IA, Substantial damage. Aircraft slid off side of runway after landing.

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