# STC SA1594SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Advanced Technology & Research Inc, United States
- Description: Installation of a Q-core bulkhead for the passenger cabin.
- Status date: March 28, 1984
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A12EA](https://openairdocs.org/tcds/A12EA)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8AEF5D4C1125462E85256CC100821408.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1594SO

## ADs that name it (0)

None.

## Approved models (1)

- Gulfstream Aerospace Corporation G-1159 Series ([TCDS A12EA](https://openairdocs.org/tcds/A12EA))

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