# STC SA4-535

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Flying Tiger Line Inc, United States
- Description: C-O-Two smoke detector system.
- Status date: April 14, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A2](https://openairdocs.org/tcds/3A2), [TCDS A-772](https://openairdocs.org/tcds/A-772), [TCDS A-786](https://openairdocs.org/tcds/A-786), [TCDS A-789](https://openairdocs.org/tcds/A-789), [TCDS A-808](https://openairdocs.org/tcds/A-808)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C763EFD423F4CF288625742E005C21BD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-535

## ADs that name it (0)

None.

## Approved models (5)

- Curtiss-Wright Corporation C-46 Series ([TCDS 3A2](https://openairdocs.org/tcds/3A2))
- Curtiss-Wright Corporation C-46 Series ([TCDS A-772](https://openairdocs.org/tcds/A-772))
- Curtiss-Wright Corporation C-46 Series ([TCDS A-789](https://openairdocs.org/tcds/A-789))
- Curtiss-Wright Corporation C-46E ([TCDS A-786](https://openairdocs.org/tcds/A-786))
- Curtiss-Wright Corporation C-46F ([TCDS A-808](https://openairdocs.org/tcds/A-808))

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