Installation of Sperry SP-40C auto flight control system and SPI-73B Sperry instrumentation system.
FAA holder: Honeywell International Inc
Aircraft STC directory
The Jun 30, 2026 FAA DRS snapshot contains 9 selected supplemental type certificates with status Current whose public applicability data names the Lockheed Aircraft 1329-23E. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
Showing the 9 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
FAA holder: Honeywell International Inc
FAA holder: Standard Aero
FAA holder: Aerosonic Corporation
FAA holder: PATS Aircraft LLC
FAA holder: PATS Aircraft LLC
FAA holder: Seagull Aircraft Corp.
FAA holder: Learjet Inc
FAA holder: Duncan Aviation, Inc
FAA holder: Duncan Aviation, Inc