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Avionics

STC ST02230SE

FAA DRS lists ST02230SE as Current · Amended, held by Butler National Corporation, for Learjet 24, Learjet 24A, and Learjet 24B-A, and 18 more aircraft configurations. Recorded change: The installation of dual Garmin GTX-33ES Mode-S transponders and single or dual Garmin GTN 650/750 panel mounted navigation and global positioning system (GPS) units, or dual Garmin GTX-335R and/or GTX-345R Mode-S transponders and single or dual Garmin GTN 650/750/625/725 panel mounted navigation and GPS units. Snapshot dated June 30, 2026.

FAA-listed holder
Butler National Corporation
Aircraft configurations
21
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

ST02230SE identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.

Applicability

Aircraft named in FAA DRS

Named aircraft: Learjet 24, Learjet 24A, and Learjet 24B-A, and 18 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Learjet 24A10CELearjet 24AA10CELearjet 24B-AA10CELearjet 24BA10CELearjet 24CA10CELearjet 24DA10CELearjet 24EA10CELearjet 24F-AA10CELearjet 24FA10CELearjet 25A10CELearjet 25AA10CELearjet 25BA10CELearjet 25CA10CELearjet 25DA10CELearjet 25FA10CELearjet 31A10CELearjet 31AA10CELearjet 35A10CELearjet 35A (C-21A)A10CELearjet 36A10CELearjet 36AA10CE

Buyer checks

Confirm before sourcing

Related avionics STCs

SA3038WE-DAvionics

Installation of dual Collins FD-109 Flight Director System in accordance with master list of drawings and related documents for United Air Lines Change Order Authorization No. 2-4950 dated April 27, 1977 or later FAA approved revision. Each system consists of one each of the following components. Roll computer P/N 522-4428-008, Pitch Computer P/N 522-4892-008, Instrument Amplifier P/N 522-3874-005, Control Panel P/N 522-4431-001, Horizon Flight Director Indicator P/N 522-4430-002, Course Deviation\nIndicator P/N 522-2782-004, Pitch Mode Annunciator P/N R2901-159 and Roll Mode Annunciator P/N R2901-160. The Boeing DC-8-61 FAA Approved Aircraft Flight Manual DAC-33161 has been reviewed and no revision is required as a result of this change.

FAA holder: United Airlines Inc

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