# STC SH1599SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Orlando Heli Airways Inc, United States
- Description: Removal of main transmission oil cooler blower and associated parts.
- Status date: April 26, 1984
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 1H4](https://openairdocs.org/tcds/1H4), [TCDS HR1SO](https://openairdocs.org/tcds/HR1SO)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3BA0499697A8490E85256CC2005C2EC2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH1599SO

## ADs that name it (0)

None.

## Approved models (10)

- Sikorsky Aircraft Corporation CH-19E ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))
- Sikorsky Aircraft Corporation H-19A ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))
- Sikorsky Aircraft Corporation H-19D ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))
- Sikorsky Aircraft Corporation H-19G ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))
- Sikorsky Aircraft Corporation HRS-1/CH-19 ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))
- Sikorsky Aircraft Corporation HRS-3/H-19B ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))
- Sikorsky Aircraft Corporation S-55 ([TCDS 1H4](https://openairdocs.org/tcds/1H4))
- Sikorsky Aircraft Corporation S-55B ([TCDS 1H4](https://openairdocs.org/tcds/1H4))
- Sikorsky Aircraft Corporation UH-19C ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))
- Sikorsky Aircraft Corporation YH-19A ([TCDS HR1SO](https://openairdocs.org/tcds/HR1SO))

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