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Avionics

STC ST4532NM

FAA DRS lists ST4532NM as Current · Reissued, held by Avtech Corporation, for Boeing 737-900 Series, Boeing 737-400 Series, and Boeing 737-100 Series, and 9 more aircraft configurations. Recorded change: Installation of Coltech CTD-80 ATSCALL, enabling company calling of selected aircraft via company selected radio. Snapshot dated June 30, 2026.

FAA-listed holder
Avtech Corporation
Aircraft configurations
12
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of Coltech CTD-80 ATSCALL, enabling company calling of selected aircraft via company selected radio.

ST4532NM 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 737-900 Series, Boeing 737-400 Series, and Boeing 737-100 Series, and 9 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 737-900 SeriesA16WEBoeing 737-400 SeriesA16WEBoeing 737-100 SeriesA16WEBoeing 737-200 SeriesA16WEBoeing 737-200C SeriesA16WEBoeing 737-300 SeriesA16WEBoeing 737-500 SeriesA16WEBoeing 737-700 SeriesA16WEBoeing 737 SeriesA16WEBoeing 737A16WEBoeing 737-800 SeriesA16WEBoeing 737-600 SeriesA16WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 737-900 Series and Boeing 737-400 Series, and 10 more aircraft configurations 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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