# STC ST965SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Puerto Rico Intl Airlines Inc, United States
- Description: Modification of cockpit direct vision window.
- Status date: December 7, 1977
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-816](https://openairdocs.org/tcds/A-816)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1B911AA60CC1434585256CCB00601A34.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST965SO

## ADs that name it (0)

None.

## Approved models (3)

- The de Havilland Aircraft Co. Ltd (England) DH 114 Heron; Series 2A ([TCDS A-816](https://openairdocs.org/tcds/A-816))
- The de Havilland Aircraft Co. Ltd (England) DH 114 Heron; Series 2DA ([TCDS A-816](https://openairdocs.org/tcds/A-816))
- The de Havilland Aircraft Co. Ltd (England) DH 114 Heron; Series 2X ([TCDS A-816](https://openairdocs.org/tcds/A-816))

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