# STC ST957SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Puerto Rico Intl Airlines Inc
- Description: Installation of Teledyne battery Model BB638/T-C replacing two Rebat R-35 batteries.
- Status date: September 22, 1977
- Data sheets: A-816, A-816, A-816
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0087565E89037F4285256CCB00601A33.0001
- Page: https://openairdocs.org/stc/ST957SO

## ADs that name it

None.

## Approved models (3)

- The de Havilland Aircraft Co. Ltd (England) DH 114 Heron; Series 2A (TCDS A-816)
- The de Havilland Aircraft Co. Ltd (England) DH 114 Heron; Series 2DA (TCDS A-816)
- The de Havilland Aircraft Co. Ltd (England) DH 114 Heron; Series 2X (TCDS A-816)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.