# STC SR02053AK

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Evergreen Helicopters of Alaska, Inc., United States
- Description: Installation of McAllister electric heater system.
- Status date: July 24, 1996
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS R00007AT](https://openairdocs.org/tcds/R00007AT)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6D5D967988D4B2FE85256CC200622796.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR02053AK

## ADs that name it (0)

None.

## Approved models (1)

- Sikorsky Aircraft Corporation USAF CH-3E ([TCDS R00007AT](https://openairdocs.org/tcds/R00007AT))

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