# STC SA4278NM-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Gulfstream Aerospace Corporation, United States
- Description: Installation of a single Universal Navigation UNS-1M Navigation Management System (NMS) with the internal Universal Navigation Global Positioning System (GPS) Sensor. Installation is limited to serial numbers 1253 and subsequent or prior serial numbers with Aircraft Service Change (ASC) 345.
- Status date: October 19, 1995
- 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/12FF65F0D8928D4385256CC2000E3B1C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4278NM-D

## ADs that name it (0)

None.

## Approved models (1)

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

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