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Avionics

STC ST04254CH

FAA DRS lists ST04254CH as Current · Reissued, held by Duncan Aviation Inc, for Boeing 737-200 Series. Recorded change: Installation of Datalink Communications System supporting Air Traffic Services (ATS) using Universal Avionics UL-801 Unilink System, Dual UNS-1(-)W Flight Management Systems and upgrade to CVR 120A for data link recording. Snapshot dated June 30, 2026.

FAA-listed holder
Duncan Aviation Inc
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of Datalink Communications System supporting Air Traffic Services (ATS) using Universal Avionics UL-801 Unilink System, Dual UNS-1(-)W Flight Management Systems and upgrade to CVR 120A for data link recording.

ST04254CH 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 737-200 Series. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 737-200 SeriesA16WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 737-200 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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