# STC SH2720SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Enviro Systems Inc., United States
- Description: Installation of Aero Aire Model 234 Environmental Control System (ECS) in accordance with Aero Aire Master Drawing List Document No. A234R002, Revision B, dated March 7, 1990, or later FAA Approved Revision.
- Applied: February 14, 1989
- Status date: June 20, 2003
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H9EA](https://openairdocs.org/tcds/H9EA)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E32748B433850C7786256D71007123AC.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH2720SO

## ADs that name it (0)

None.

## Approved models (1)

- Boeing Defense & Space Group 234 ([TCDS H9EA](https://openairdocs.org/tcds/H9EA))

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