# STC SA542AL

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Crosswinds STOL, United States
- Description: Installation of leading edge cuff.
- Status date: March 4, 1977
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A4](https://openairdocs.org/tcds/1A4)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/102AAE838D66875785256CC200122907.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA542AL

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-20 Series ([TCDS 1A4](https://openairdocs.org/tcds/1A4))

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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.