# STC SA1620GL

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Northwest Airlines Inc., United States
- Description: Installation of turbulence prediction systems advance warning airborne system (AWAS), Honeywell windshear detection system (WSS), and a Sundstrand data recorder.
- Applied: December 3, 1990
- Status date: June 28, 1991
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/b9/d6/b9d64190a1df94a654d028beaba187d0b2c11c0fd2a3f41757e1ab4a64e6bacd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179203125320260805182443.0001
- DRS record last changed: August 5, 2026
- Page: https://openairdocs.org/stc/SA1620GL

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-9-31 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- June 28, 1991: Issued, Current. [certificate](https://openairdocs.org/files/sha256/b9/d6/b9d64190a1df94a654d028beaba187d0b2c11c0fd2a3f41757e1ab4a64e6bacd)

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