# STC SA4-425

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Garside's Aircraft & Engine Parts & Svc Inc, United States
- Description: Modification per STC SA4-69 except gross weight modification per Dwg. 600030B, engine per Dwg. 606399 and DCN-1, picture window per STC SA-368 and pilot seat per STC SA4-397.
- Status date: February 1, 1984
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-723](https://openairdocs.org/tcds/A-723)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6CE303AF682433485256CC2000C5E9D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-425

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation Lockheed 18 ([TCDS A-723](https://openairdocs.org/tcds/A-723))

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