# STC SA3423WE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: California National Air Services, Inc., United States
- Description: Installation of 2000 gallon capacity external retardant tank under the fuselage at wing center section
- Status date: June 10, 1977
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-762](https://openairdocs.org/tcds/A-762)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D1967D36ECC19BC485256CC2000A97EC.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3423WE

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-4 ([TCDS A-762](https://openairdocs.org/tcds/A-762))

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