# STC SA1-3

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Mattituck Airbase Corp, United States
- Description: Replacement of wing panel fabric by 025 aluminum, 24ST ALCLAD.
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 654](https://openairdocs.org/tcds/654)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/018B65523EAA948885256CCB00601810.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-3

## ADs that name it (0)

None.

## Approved models (8)

- Grumman American Aviation Corporation G-21 ([TCDS 654](https://openairdocs.org/tcds/654))
- Grumman American Aviation Corporation G-21A (Army OA-9) ([TCDS 654](https://openairdocs.org/tcds/654))
- Grumman American Aviation Corporation G-21A (Navy JRF-1) ([TCDS 654](https://openairdocs.org/tcds/654))
- Grumman American Aviation Corporation G-21A (Navy JRF-2) ([TCDS 654](https://openairdocs.org/tcds/654))
- Grumman American Aviation Corporation G-21A (Navy JRF-3) ([TCDS 654](https://openairdocs.org/tcds/654))
- Grumman American Aviation Corporation G-21A (Navy JRF-4) ([TCDS 654](https://openairdocs.org/tcds/654))
- Grumman American Aviation Corporation G-21A (Navy JRF-5) ([TCDS 654](https://openairdocs.org/tcds/654))
- Grumman American Aviation Corporation G-21A (Navy JRF-6B) ([TCDS 654](https://openairdocs.org/tcds/654))

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