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Avionics

STC ST03947AT

FAA DRS lists ST03947AT as Current · Issued, held by Stevens Aviation Inc., for Cessna Aircraft 550. Recorded change: Electronic Flight Instrument System, Attitude Heading Reference System, Air Data System, Mode S Transponders, Standby Instruments, WAAS FMS, Terrain Awareness Warning System, and Vision 1 Systemon the Cessna Model 550, Citation II aircraft. Snapshot dated June 30, 2026.

FAA-listed holder
Stevens Aviation Inc.
Aircraft configurations
1
FAA revision date
FAA status
Current · Issued

Recorded modification

What the FAA record covers

Electronic Flight Instrument System, Attitude Heading Reference System, Air Data System, Mode S Transponders, Standby Instruments, WAAS FMS, Terrain Awareness Warning System, and Vision 1 Systemon the Cessna Model 550, Citation II aircraft.

ST03947AT 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: Cessna Aircraft 550. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Cessna Aircraft 550A22CE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Cessna Aircraft 550 model, serial range, and configuration?
  2. 02Which part numbers, software versions, interfaces, and manual changes 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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ST04219ATAvionics

Version 7.1 Software upgrade of the Aviation Communication & Surveillance Systems (ACSS) TCAS II, Model TCAS 2000, P/N 7517900-10020 (Configuration 1) or Model T2CAS, P/N 9000000-11414 (Configuration 2). This upgrade allows for the installation of Configuration 1 TCAS II. The installation also includes a Mode S ATC Transponder System with ADS-B Out, Model XS-950, P/N 7517800- 10400.

FAA holder: Aviation Communication and Surveillance Systems (ACSS) LLC

View record