# STC SA2574SO

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Kosola & Associates Inc, United States
- Description: Installation of a Floor Proximity Emergency Escape Path Marking system.
- Applied: November 1, 1988
- Status date: July 23, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/ee/b3/eeb304c3514cbabec8744b5d6a12fe0a448c15487399af376dfb957c84c8bac0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A0612338C50B06548625778F00738ADE.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2574SO

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-9-30 Series ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## What the certificate says

The certificate has no text we could read; open the PDF to read it.

## Every issue (1)

- July 23, 2009: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/ee/b3/eeb304c3514cbabec8744b5d6a12fe0a448c15487399af376dfb957c84c8bac0)

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