# STC SH4-181

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Vibration Isolation Products Corp, United States
- Description: Installation of VIP P/N 101-79 mounts.
- Status date: September 16, 1986
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 1H4](https://openairdocs.org/tcds/1H4)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/449201B47A7B6A5A85256CC2005C31BC.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH4-181

## ADs that name it (0)

None.

## Approved models (1)

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

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