# STC SH1072SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Orlando Heli Airways Inc, United States
- Description: Installation of dust boot retainer rings (in rotor head dampers).
- Status date: May 18, 1979
- 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/4AF5B856E494DD5185256CC2005C2DFD.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH1072SO

## ADs that name it (0)

None.

## Approved models (6)

- 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 S-55 ([TCDS 1H4](https://openairdocs.org/tcds/1H4))
- Sikorsky Aircraft Corporation S-55B ([TCDS 1H4](https://openairdocs.org/tcds/1H4))
- Sikorsky Aircraft Corporation S-55C ([TCDS 1H4](https://openairdocs.org/tcds/1H4))

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