# STC SA1855NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: AiResearch Aivation Service Co, United States
- Description: Installation of dual Delco carousel C-SIX inertial navigation systems and optional installation of Global NDB-2 navigation data bank.
- Status date: May 11, 1983
- 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/54C67412B7C953CF85256CC10083D1B0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1855NM

## ADs that name it (0)

None.

## Approved models (1)

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

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