# STC SR08999RC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Petroleum Helicopters Inc, United States
- Description: Installation of an environmental control unit system cutoff switch on pilot cyclic grip.
- Status date: January 20, 1995
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H3EU](https://openairdocs.org/tcds/H3EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7ECB40DF5D29525D85256CC2006227B4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR08999RC

## ADs that name it (0)

None.

## Approved models (1)

- Eurocopter Deutschland GmbH BO-105C ([TCDS H3EU](https://openairdocs.org/tcds/H3EU))

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