FAA · Supplemental Type Certificate
STC SR00925DE
Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality
What is an STC?
A Supplemental Type Certificate authorizes a major modification or alteration to an FAA-certificated aircraft. STCs are how operators legally install new avionics, change fuel systems, add floats, swap engines, etc. — every change beyond a minor modification needs one.
Applicable aircraft (18)
- H13EU Airbus Helicopters Deutschland GmbH · MBB-BK 117 A-1
- H13EU Airbus Helicopters Deutschland GmbH · MBB-BK 117 A-3
- H13EU Airbus Helicopters Deutschland GmbH · MBB-BK 117 A-4
- H13EU Airbus Helicopters Deutschland GmbH · MBB-BK 117 B-1
- H13EU Airbus Helicopters Deutschland GmbH · MBB-BK 117 B-2
- H13EU Airbus Helicopters Deutschland GmbH · MBB-BK 117 C-1
- H13EU Airbus Helicopters Deutschland GmbH · MBB-BK 117 C-2
- H10EU Airbus Helicopters · AS-365N2
- H10EU Airbus Helicopters · AS-365N3
- H10EU Airbus Helicopters · SA-365N1
- H9SW Bell Helicopter Textron A Division of Textron Canada · 222
- H9SW Bell Helicopter Textron A Division of Textron Canada · 222B
- H9SW Bell Helicopter Textron A Division of Textron Canada · 222U
- H9SW Bell Helicopter Textron A Division of Textron Canada · 230
- H1SW Bell Textron Inc. · 205A
- H1SW Bell Textron Inc. · 205A-1
- H4SW Bell Textron Inc. · 212
- H4SW Bell Textron Inc. · 412
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗