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Other aircraft modifications

STC SH4680SW

FAA DRS lists SH4680SW as Current · Reissued, held by Enviro Systems Inc., for Sikorsky Aircraft S-76A. Recorded change: Installation of Freon air conditioning system in accordance with Drawing List Report No. DL-5, Revision C, dated April 1, 1983, or later FAA approved revision. Snapshot dated June 30, 2026.

FAA-listed holder
Enviro Systems Inc.
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Installation of Freon air conditioning system in accordance with Drawing List Report No. DL-5, Revision C, dated April 1, 1983, or later FAA approved revision.

SH4680SW 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: Sikorsky Aircraft S-76A. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Sikorsky Aircraft S-76AH1NE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Sikorsky Aircraft S-76A model, serial range, and configuration?
  2. 02Which configuration, parts, installation data, limitations, and ICAs 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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