What it approves
Installation of the Collins Proline II dual TDR-90 transponders.
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
No AD in this release names this STC
Supplemental type certificate · Sikorsky Aircraft
- Holder
- Sikorsky Aircraft · United States
- Status
- Current · Amended
- Status date
- January 28, 1991
- Product
- Aircraft · Rotorcraft
- Certification basis
- Part 21
- Data sheet
- TCDSH1NE
From FAA DRS. DRS record last changed December 6, 2025.