# STC SA2-422

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aircraft engineering Foundation Inc, United States
- Description: Modification to provide eligibility for airworthiness certification in the transport category under SR-406C.
- Applied: October 15, 1957
- Status date: March 28, 1958
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-786](https://openairdocs.org/tcds/A-786), [TCDS A-772](https://openairdocs.org/tcds/A-772), [TCDS A-789](https://openairdocs.org/tcds/A-789), [TCDS A-808](https://openairdocs.org/tcds/A-808), [TCDS 3A2](https://openairdocs.org/tcds/3A2)
- Certificate PDF: https://openairdocs.org/files/sha256/f1/2b/f12b197b12301f29e6788553bdd2791eb0aecd1d32b4f7588f48f1c5d6116649
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/917E3B723CC2A221862576E70044B63F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2-422

## ADs that name it (1)

- [AD 62-10-02](https://openairdocs.org/ad/62-10-02): Landing Gear Doors · Airlift International C-46A, C-46D, C-46F and 12 more. Named in the applicability

## Approved models (12)

- Airlift International Inc. C-46A ([TCDS 3A2](https://openairdocs.org/tcds/3A2))
- Airlift International Inc. C-46D ([TCDS 3A2](https://openairdocs.org/tcds/3A2))
- Airlift International Inc. C-46F ([TCDS 3A2](https://openairdocs.org/tcds/3A2))
- Curtiss-Wright Corporation C-46E ([TCDS A-786](https://openairdocs.org/tcds/A-786))
- Flying Tiger Line Inc. C-46A ([TCDS A-772](https://openairdocs.org/tcds/A-772))
- Flying Tiger Line Inc. C-46D ([TCDS A-772](https://openairdocs.org/tcds/A-772))
- Flying Tiger Line Inc. C-46E ([TCDS A-772](https://openairdocs.org/tcds/A-772))
- Flying Tiger Line Inc. C-46F ([TCDS A-772](https://openairdocs.org/tcds/A-772))
- L. B. Smith Aircraft Corporation C-46A ([TCDS A-789](https://openairdocs.org/tcds/A-789))
- L. B. Smith Aircraft Corporation C-46D ([TCDS A-789](https://openairdocs.org/tcds/A-789))
- L. B. Smith Aircraft Corporation C-46F ([TCDS A-789](https://openairdocs.org/tcds/A-789))
- Skyways International Trading and Transport Co. C-46F ([TCDS A-808](https://openairdocs.org/tcds/A-808))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- March 28, 1958: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f1/2b/f12b197b12301f29e6788553bdd2791eb0aecd1d32b4f7588f48f1c5d6116649)

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