# STC SA3599WE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Litton Systems, Inc, United States
- Description: Installation of single or dual Litton LTN-201 Omega navigation as a means to update INS or doppler in the NAT MNPS airspace.
- Status date: May 8, 1978
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/372645156356BDBF85256CC2000A999F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3599WE

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707-300 Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

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