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Avionics

STC ST01911LA

FAA DRS lists ST01911LA as Current · Issued, held by Aviation Communication and Surveillance Systems (ACSS) LLC, for Boeing 747-400 Series. Recorded change: Installation of ACSS Mode S Transponder with ELS/EHS capability to replace Mode S Transponder in existing ACSS Traffic Alert and Collision Avoidance System TCAS II. Snapshot dated June 30, 2026.

FAA-listed holder
Aviation Communication and Surveillance Systems (ACSS) LLC
Aircraft configurations
1
FAA revision date
FAA status
Current · Issued

Recorded modification

What the FAA record covers

Installation of ACSS Mode S Transponder with ELS/EHS capability to replace Mode S Transponder in existing ACSS Traffic Alert and Collision Avoidance System TCAS II.

ST01911LA 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: Boeing 747-400 Series. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 747-400 SeriesA20WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 747-400 Series 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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