# STC SA425WE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Airlines Inc, United States
- Description: Single Federal (ITT) Type AFN3544 distance measuring equipment system.
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A10](https://openairdocs.org/tcds/4A10)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B6864121F28846AA862570D100554AF3.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA425WE

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-7 Series ([TCDS 4A10](https://openairdocs.org/tcds/4A10))

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.