# STC SA1644SO

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Pemco Aeroplex Inc, United States
- Description: Installation of main landing gear down-lock indicator system.
- Applied: August 28, 1984
- Status date: August 4, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/40/74/4074602bb639369b7a4bfc5fb35e9e6281cf1fc5fe0edec428978b4f132a6f79
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7D63AB56B28A97FC862577420073C11C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1644SO

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## What the certificate says

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

## Every issue (1)

- August 4, 2009: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/40/74/4074602bb639369b7a4bfc5fb35e9e6281cf1fc5fe0edec428978b4f132a6f79)

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