# STC SA1-52

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Hartzell Propeller, Inc, United States
- Description: Installation of new propellers. Installation of emergency governor crossfeed system for unfeathering.
- Status date: October 23, 1967
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: TCDS 654
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DD4E09493813D06585256CC10080DB85.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-52

## ADs that name it (1)

- [AD 79-02-03](https://openairdocs.org/ad/79-02-03): Engine Restart · Grumman American G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) with STC SA1-52. Effective Jan 29, 1979. Named in the applicability

## Approved models (8)

- Grumman American Aviation Corporation G-21 (TCDS 654)
- Grumman American Aviation Corporation G-21A (Army OA-9) (TCDS 654)
- Grumman American Aviation Corporation G-21A (Navy JRF-1) (TCDS 654)
- Grumman American Aviation Corporation G-21A (Navy JRF-2) (TCDS 654)
- Grumman American Aviation Corporation G-21A (Navy JRF-3) (TCDS 654)
- Grumman American Aviation Corporation G-21A (Navy JRF-4) (TCDS 654)
- Grumman American Aviation Corporation G-21A (Navy JRF-5) (TCDS 654)
- Grumman American Aviation Corporation G-21A (Navy JRF-6B) (TCDS 654)

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