# STC SH505GL

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Helicopters, Inc, United States
- Description: Installation of modified tail rotor gearbox using original installation hardware and components.
- Status date: February 20, 1981
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 2H1](https://openairdocs.org/tcds/2H1)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/46375BFAE70A580485256CC2005C32C0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH505GL

## ADs that name it (0)

None.

## Approved models (4)

- Bell Helicopter Textron 47J ([TCDS 2H1](https://openairdocs.org/tcds/2H1))
- Bell Helicopter Textron 47J-2 ([TCDS 2H1](https://openairdocs.org/tcds/2H1))
- Bell Helicopter Textron 47J-2A ([TCDS 2H1](https://openairdocs.org/tcds/2H1))
- Bell Helicopter Textron 47K ([TCDS 2H1](https://openairdocs.org/tcds/2H1))

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