# STC SP1964SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Thermodyne, Inc, United States
- Description: Installation of replacement electrothermal type de-icing boots.
- Status date: January 7, 1992
- Product: Propeller
- Certification basis: Part 21
- Data sheets: [TCDS P20EA](https://openairdocs.org/tcds/P20EA), [TCDS P-884](https://openairdocs.org/tcds/P-884), [TCDS P-907](https://openairdocs.org/tcds/P-907), [TCDS P-908](https://openairdocs.org/tcds/P-908), [TCDS P-913](https://openairdocs.org/tcds/P-913), [TCDS P-920](https://openairdocs.org/tcds/P-920), [TCDS P15EA](https://openairdocs.org/tcds/P15EA), [TCDS P24EA](https://openairdocs.org/tcds/P24EA), [TCDS P25EA](https://openairdocs.org/tcds/P25EA), [TCDS P29EA](https://openairdocs.org/tcds/P29EA), [TCDS P33EA](https://openairdocs.org/tcds/P33EA), [TCDS P36EA](https://openairdocs.org/tcds/P36EA), [TCDS P37EA](https://openairdocs.org/tcds/P37EA), [TCDS P40EA](https://openairdocs.org/tcds/P40EA), [TCDS P44GL](https://openairdocs.org/tcds/P44GL), [TCDS P6EA](https://openairdocs.org/tcds/P6EA), [TCDS P9EA](https://openairdocs.org/tcds/P9EA), [TCDS P-880](https://openairdocs.org/tcds/P-880), [TCDS P21EA](https://openairdocs.org/tcds/P21EA), [TCDS P22EA](https://openairdocs.org/tcds/P22EA) and 10 more
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/484A28CF054C8A1E85256CC200622403.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SP1964SO

## ADs that name it (0)

None.

## Approved models (32)

- Hamilton Standard Division 33LF ([TCDS P20EA](https://openairdocs.org/tcds/P20EA))
- Hartzell Propeller Inc. ( )HC-C3Y Series ([TCDS P25EA](https://openairdocs.org/tcds/P25EA))
- Hartzell Propeller Inc. BHC-C2Y ([TCDS P-920](https://openairdocs.org/tcds/P-920))
- Hartzell Propeller Inc. BHC-J2Y ([TCDS P37EA](https://openairdocs.org/tcds/P37EA))
- Hartzell Propeller Inc. HC-83X ([TCDS P-884](https://openairdocs.org/tcds/P-884))
- Hartzell Propeller Inc. HC-A2V ([TCDS P24EA](https://openairdocs.org/tcds/P24EA))
- Hartzell Propeller Inc. HC-A2X ([TCDS P-908](https://openairdocs.org/tcds/P-908))
- Hartzell Propeller Inc. HC-A3V ([TCDS P6EA](https://openairdocs.org/tcds/P6EA))
- Hartzell Propeller Inc. HC-A3X ([TCDS P-913](https://openairdocs.org/tcds/P-913))
- Hartzell Propeller Inc. HC-B3P ([TCDS P29EA](https://openairdocs.org/tcds/P29EA))
- Hartzell Propeller Inc. HC-B3T ([TCDS P15EA](https://openairdocs.org/tcds/P15EA))
- Hartzell Propeller Inc. HC-B3Z ([TCDS P-907](https://openairdocs.org/tcds/P-907))
- Hartzell Propeller Inc. HC-B4T ([TCDS P40EA](https://openairdocs.org/tcds/P40EA))
- Hartzell Propeller Inc. HC-B5M ([TCDS P44GL](https://openairdocs.org/tcds/P44GL))
- Hartzell Propeller Inc. HC-C2Y ([TCDS P-920](https://openairdocs.org/tcds/P-920))
- Hartzell Propeller Inc. HC-E2Y ([TCDS P9EA](https://openairdocs.org/tcds/P9EA))
- Hartzell Propeller Inc. HC-E3Y ([TCDS P33EA](https://openairdocs.org/tcds/P33EA))
- Hartzell Propeller Inc. PHC-J3Y ([TCDS P36EA](https://openairdocs.org/tcds/P36EA))
- McCauley Propeller Systems 1A103 ([TCDS P50GL](https://openairdocs.org/tcds/P50GL))
- McCauley Propeller Systems 2A36 ([TCDS P-880](https://openairdocs.org/tcds/P-880))
- McCauley Propeller Systems 3A32C ([TCDS P21EA](https://openairdocs.org/tcds/P21EA))
- McCauley Propeller Systems 3AF32C ([TCDS P22EA](https://openairdocs.org/tcds/P22EA))
- McCauley Propeller Systems 3AF32C(5-) ([TCDS P57GL](https://openairdocs.org/tcds/P57GL))
- McCauley Propeller Systems 3GFR34C7( ) ([TCDS P60GL](https://openairdocs.org/tcds/P60GL))
- McCauley Propeller Systems D2AF34C ([TCDS P5EA](https://openairdocs.org/tcds/P5EA))
- McCauley Propeller Systems D3A32C ([TCDS P21EA](https://openairdocs.org/tcds/P21EA))
- McCauley Propeller Systems D3A34C(4 ([TCDS P47GL](https://openairdocs.org/tcds/P47GL))
- McCauley Propeller Systems E2A34C ([TCDS P3EA](https://openairdocs.org/tcds/P3EA))
- TRW Hartzell Propeller HC-83V ([TCDS P14EA](https://openairdocs.org/tcds/P14EA))
- TRW Hartzell Propeller HC-B3R ([TCDS P28EA](https://openairdocs.org/tcds/P28EA))
- TRW Hartzell Propeller HC-B3W ([TCDS P2EA](https://openairdocs.org/tcds/P2EA))
- TRW Hartzell Propeller HC-F3Y ([TCDS P31EA](https://openairdocs.org/tcds/P31EA))

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