Aircraft STC directory

Learjet Learjet 23 STCs

The Jun 30, 2026 FAA DRS snapshot contains 9 selected supplemental type certificates with status Current whose public applicability data names the Learjet Learjet 23. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

listed Current at snapshot

holder directories

modification categories

Sep 1, 2016

latest recorded revision

Modification demand surface

Flight controls2

Engine and powerplant2

Other aircraft modifications2

Cargo and special mission1

Cabin and interiors1

Avionics1

Recorded holders

Avcon Industries Inc3 Paul/ Lanna Egan LLC1 Bizjet International Sales & Support Inc1 Aviation Fabricators Inc1 Insight Instrument Corporation1 Sierra Industries Inc1

Recently revised Learjet 23 STCs

Showing the 9 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA1555GLCargo and special missionRevised Sep 1, 2016

Install air ambulance stretcher P/N 125 using installation kit P/N 803. Approval for stretcher structure, structural attachment of an oxygen bottle, and optional medical oxygen system only.

FAA holder: Paul/ Lanna Egan LLC

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SA237NWFlight controlsRevised Nov 16, 2010

Installation of the Mark II performance system, including recontoured wing leading edge, recontoured flap leading edge, wing vortex generator removal, installation of wing stall strips and other minor refinements in accordance with Avcon Master Drawing List No. 1083 dated November 16, 2010 or later FAA approved revision. An FAA Approved Airplane Flight Manual Supplement is required.

FAA holder: Avcon Industries Inc

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SA2446SWCabin and interiorsRevised Jun 3, 2010

Installation of cabin door closing system in accordance with Drawing List No. 34 dated 3/17/80 or later FAA approved revision.

FAA holder: Avcon Industries Inc

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SA2715SWEngine and powerplantRevised Jun 3, 2010

Installation of access doors in engine nacelle according to Drawing 375201, Revision A, dated 1/13/78, or later FAA approved revision.

FAA holder: Avcon Industries Inc

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SA8930SWEngine and powerplantRevised May 2, 2006

Installation of Bizjet International Inlet Anti-ice Heat Blanket.

FAA holder: Bizjet International Sales & Support Inc

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SA1132SWOther aircraft modificationsRevised Aug 10, 2002

Installation of side facing seats.

FAA holder: Aviation Fabricators Inc

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ST01511NYAvionicsRevised Jul 12, 2002

Installation of Insight Instrument Corporation (IIC) Heading Gyro 4000.

FAA holder: Insight Instrument Corporation

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SA1845SOOther aircraft modificationsRevised Jul 3, 2001

Installation of Stretcher System.

FAA holder: National Jets, Inc

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SA1655AC-TFlight controlsRevised May 17, 2001

Installation of Mark II performance system, including recontoured wing leading edge, recontoured flap leading edge, wing vortex, generator removal, installation of wing stall strips and other minor refinements.

FAA holder: Sierra Industries, Inc

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