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Other aircraft modifications

STC ST01138DE

FAA DRS lists ST01138DE as Current · Reissued, held by Butler National Corporation, for Learjet 24, Learjet 24A, and Learjet 24B, and 22 more aircraft configurations. Recorded change: Installation of MidContinent MD23 standby altimeter and/or attitude indicators. Snapshot dated June 30, 2026.

FAA-listed holder
Butler National Corporation
Aircraft configurations
25
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of MidContinent MD23 standby altimeter and/or attitude indicators.

ST01138DE 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, and 22 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Learjet 24A10CELearjet 24AA10CELearjet 24BA10CELearjet 24B-AA10CELearjet 24CA10CELearjet 24DA10CELearjet 24EA10CELearjet 24FA10CELearjet 24F-AA10CELearjet 25A10CELearjet 25AA10CELearjet 25BA10CELearjet 25CA10CELearjet 25DA10CELearjet 25FA10CELearjet 31A10CELearjet 31AA10CELearjet 35A10CELearjet 35A (C-21A)A10CELearjet 36A10CELearjet 36AA10CELearjet 55A10CELearjet 55BA10CELearjet 55CA10CELearjet 60A10CE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Learjet 24 and Learjet 24A, and 23 more aircraft configurations model, serial range, and configuration?
  2. 02Which configuration, parts, installation data, limitations, and ICAs apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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