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Avionics

STC SA4891NM

FAA DRS lists SA4891NM as Current · Reissued, held by ACSS (Aviation Communication and Surveillance Syst, for Boeing 727C Series, Boeing 727-100 Series, and Boeing 727, and 3 more aircraft configurations. Recorded change: Installation of Honeywell Vertical Speed Indicator/Traffic Resolution Advisory (VSI/TRA) display. Snapshot dated June 30, 2026.

FAA-listed holder
ACSS (Aviation Communication and Surveillance Syst
Aircraft configurations
6
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of Honeywell Vertical Speed Indicator/Traffic Resolution Advisory (VSI/TRA) display.

SA4891NM 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 727C Series, Boeing 727-100 Series, and Boeing 727, and 3 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 727C SeriesA3WEBoeing 727-100 SeriesA3WEBoeing 727A3WEBoeing 727-200F SeriesA3WEBoeing 727-100C SeriesA3WEBoeing 727-200 SeriesA3WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 727C Series and Boeing 727-100 Series, and 4 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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