# STC SA2137WE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Litton Systems, Inc, United States
- Description: Installation of Litton inertial navigation system(s) LTN51 (dual or single) or LTN72 (dual or single).
- Status date: December 14, 1978
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CD7FF20DCCCC4CB585256CC200015A1C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2137WE

## ADs that name it (0)

None.

## Approved models (2)

- McDonnell Douglas Corporation DC-8-55 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))
- McDonnell Douglas Corporation DC-8F-54 ([TCDS 4A25](https://openairdocs.org/tcds/4A25))

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