Trio Autopilot for Your Cessna 172 Aircraft
Fly with Confidence – The Trio Pro Pilot is FAA-certified and ships as a complete install kit. No EFIS? No problem. Compatible with dozens of panel-mounted and portable GPS units—including Garmin, Avidyne, and more.
Proven Precision for the Most Flown Aircraft in History
The Trio ProPilot is FAA-approved for the Cessna 172 Series, including dozens of supported models. Whether you’re flying a legacy 172M or a later non-G1000 172S, this system adds stability, reduced workload, and control—on VFR or IFR flights.
Install kits are tailored to your aircraft, complete with hardware, wire harness, and STC paperwork to simplify certification and installation.
- ✔️ 172
- ✔️ 172A
- ✔️ 172B
- ✔️ 172C
- ✔️ 172D
- ✔️ 172E
- ✔️ 172F (USAF T-41A)
- ✔️ 172G
- ✔️ 172H (USAF T-41A)
- ✔️ 172I
- ✔️ 172K
- ✔️ 172L
- ✔️ 172M
- ✔️ 172N
- ✔️ 172P
- ✔️ 172Q
- ✔️ 172R (non-G1000)
- ✔️ 172S (non-G1000)
FAA Approved
Approved for over a dozen 172 variants including 172M, N, P, R, and S
Easy Installation
Model-specific kits with prebuilt harness and hardware provided.
No EFIS Required
Requires only a GPS—integrates with Aspen, G5, Dynon and more coming soon.
Shop Friendly
A&P/IA support with complete docs, wiring diagrams, install tips and phone support.
EFIS & GPS Compatibility
✅ Compatible EFIS Systems Include:
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Aspen Evolution, E5, ProMax – Approved
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Garmin G5 – With GAD29 B/D
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Dynon SkyView – Unlock available
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Garmin GI 275 – Expected 2025
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uAvionix AV-30C – Expected 2025
✅ Compatible GPS Units
Trio Autopilot works with a wide range of panel-mounted and portable GPS systems from leading manufacturers:
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Garmin – GTN, GNS, AERA, GPSMAP, G3X, and legacy series
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Avidyne – IFD Series
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Dynon – SkyView HDX (via ARINC-429 converter)
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Aspen Avionics – EFD1000 Series
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IFLY GPS – Compatible portable solutions
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Other brands supported – Including AVMAP, BendixKing, Lowrance, AnywhereMap, and more
📄 View Full GPS & Avionics Compatibility List (PDF)
Documentation & Downloads
🧾 LEGAL DOCUMENTS
🛡️Compliance + Reference Pack (ZIP)
Compliance & Reference Pack (04/2025)
This pack includes all regulatory and compliance documentation such as the STC, AML, FAA 337 Form Examples, Software Logbook Entries, and Compatibility Lists — ideal for shops and inspectors needing verified certification references.
🔹 Trio Autopilot STC (10/2017)
Trio Autopilot FAA STC – SA04230CH
Official Supplemental Type Certificate documentation required for certified installation of the Trio Pro Pilot Autopilot.
🔗 View STC PDF |
⬇️ Trio Autopilot Approved Model List – SA04230CH AML (Signed)
Official FAA Approved Model List (AML) signed by STC Group. Lists all aircraft models certified for use with the Trio Pro Pilot Autopilot.
🔗 View Approved Models List |
⬇️ Download Approved Models List
🔹 Trio Autopilot FAA 337 Form Example (02/2025)
Trio Autopilot FAA 337 Form Example – (02/2025)
Example of FAA Form 337 for field approval of a certified Trio Pro Pilot Autopilot installation. Provided as a reference for installers and IAs.
🔹 EFIS Compatibility List (09/2024)
List of EFIS and GPS systems approved for use or under review for future integration with Trio.
🔗 View List | ⬇️ Download PDF
🔹Avionics Compatibility List Rev F
Trio Autopilot GPS Compatibility List – REV F
Latest approved avionics and GPS units compatible with the Trio Pro Pilot Autopilot system.
🔹Trio Autopilot Software Upgrade Log Book Entry Sample
Trio Pro Pilot Software Upgrade Example
Illustrative example showing a log book entry for a Trio Pro Pilot Autopilot software upgrade.
🔗 View Software Upgrade Example |
⬇️ Download Software Upgrade Example
🔹Weight & Balance Example
Trio Autopilot Weight & Balance Example
Sample weight and balance documentation to assist with Trio Pro Pilot Autopilot installation certification.
🔗 View Weight & Balance Example |
⬇️ Download Weight & Balance Example
🔹Airframe Specific Weight & Balance Entry Help
Airframe-Specific Weight & Balance Information
For weight and balance documentation tailored to your aircraft model, please contact our certification partner directly.
📧 Email Jeff Odum at STC Group for aircraft-specific weight and balance documentation.
🧑✈️ PILOT RESOURCES
📘Pilot Resource Zip Pack (ZIP)
Pilot Resource Pack (04/2025)
This downloadable ZIP contains all current pilot-oriented resources for Trio Autopilot use and safety. Includes the Certified ProPilot Manual, Flight Manual Supplement, Avionics Addendum, and Gain Setting Charts.
🔹 Certified ProPilot Manual (12/2024)
Trio Pro Pilot Operations Manual – 12/2024
Official pilot operating manual for the certified Trio Pro Pilot Autopilot system. Includes safety features, modes, and usage guidance.
🔹 Airplane Flight Manual Supplement (09/2024) - Fillable
Trio Autopilot Flight Manual Supplement (AFMS) – FILLABLE – L-1006-01 Rev D (09/2024)
Fillable version of the official Flight Manual Supplement required for certified installations of the Trio Pro Pilot Autopilot.
🔗 View AFMS |
⬇️ Download AFMS
🔹 Avionics Addendum (08/2023)
Trio Autopilot Avionics Addendum – E-1006-12 Rev B (08/2023)
Supplemental avionics integration guidance for use with the Trio Pro Pilot Autopilot system. Includes information on supported configurations and settings.
🔹 Trio Autopilot Servo Gain Settings Flow Chart
Trio Autopilot Servo Gain Settings Flow Chart
Visual guide for adjusting servo gain settings on the Trio Pro Pilot Autopilot. Use during configuration and fine-tuning of control responsiveness.
🔗 View Servo Gain Flow Chart |
⬇️ Download Servo Gain Flow Chart
🔹 LNAV Gain Setting Flow Chart
Trio Autopilot LNAV Gain Setting Flow
Flowchart outlining recommended procedures for configuring lateral navigation (LNAV) gain settings on the Trio Pro Pilot Autopilot.
🔗 View LNAV Gain Setting Flow |
⬇️ Download LNAV Gain Setting Flow
🔹 VNAV Gain Setting Flow Chart
Trio Autopilot VNAV Gain Setting Flowchart
Flowchart outlining recommended procedures for configuring vertical navigation (VNAV) gain settings on the Trio Pro Pilot Autopilot.
🔗 View VNAV Gain Setting Flow |
⬇️ Download VNAV Gain Setting Flow
🔹 Instructions for Continued Airworthyness L-1006-02 REV M 09/2024
Instructions for Continued Airworthiness – L-1006-02 Rev M (09/2024)
Required ICA documentation for ongoing airworthiness compliance of aircraft equipped with the Trio Pro Pilot Autopilot.
🛠 INSTALLER RESOURCES
🧰 Installer Documents Pack (ZIP)
Installer Document Pack (04/2025)
Download all essential documentation needed for Trio Autopilot installation. This pack includes the latest Installation Manual, Wiring Diagrams, Pinout Charts, and the official AML for certification reference.
🔹 ProPilot Installation Manual
Not available for Direct Download. Contact Jeff by email
🔹 New Trio Autopilot System Wiring Diagram 09/2024
Trio Autopilot Wiring Diagram – REV 19 (09/2024)
Full system wiring diagram for the certified Trio Pro Pilot Autopilot. Use this document for reference during installation and troubleshooting.
🔹 Trio Pro Pilot External Air Data Wiring Diagram 09/2024
Trio Pro Pilot External Air Data Wiring Diagram – 09/2024
Wiring diagram for integrating external air data sources with the Trio Pro Pilot Autopilot. Reference during EFIS or GPS integration.
🔗 View Air Data Wiring Diagram |
⬇️ Download Air Data Wiring Diagram
🔹 EFIS System Data Test
EFIS System Data Test
Reference document for validating EFIS signal integrity and data compatibility with the Trio Pro Pilot Autopilot.
🔹GPS Wiring Diagram (02/2025)
Pinout diagram for GPS wiring connections on the Trio Autopilot
🔗 View Diagram |
⬇️ Download Diagram
🔹GPS System Data Test
GPS System Data Test
Reference document for validating GPS data signal integrity and compatibility with the Trio Pro Pilot Autopilot system.
🔹 Audio Panel Wiring Pin Out (09/2022)
Audio Panel Wiring Pin Out
Pinout diagram for wiring audio panels to the Trio Pro Pilot Autopilot. Use this for guidance during audio system integration.
🔗 View Audio Panel Pin Out |
⬇️ Download Audio Panel Pin Out
🔹Pitot Static Connections 04/2024
Pitot Static Connections – 04/2024
Pitot-static connection guide for installing the Trio Pro Pilot Autopilot in certified aircraft.
🔗 View Pitot-Static Diagram |
⬇️ Download Pitot-Static Diagram
🔹Trio Pro Pilot Post installation Flight Test Cards
Trio Autopilot Post Installation Test Flight Cards – F-1006-43 Rev E
Required checklist and documentation for validating performance after installation of the Trio Pro Pilot Autopilot.
What’s Included in Your Trio Autopilot Installation Kit
Each FAA-approved installation kit includes:
- ✔️ ProPilot Control Head
- ✔️ 2 Servos
- ✔️ Complete Wire Harness
- ✔️ 2 Switches
- ✔️ Panel Placard
- ✔️ STC Hardware Kit
- ✔️ Certification Paperwork
🧭 Need Help Planning Your Upgrade?
Speak with a certified Trio Autopilot Consultant to discuss your aircraft, avionics setup, and installation plans. We’ll help you confirm compatibility and build a system that fits your mission.
🛫 Get the Trio Pro Pilot for Your Cessna 172
Order the FAA-approved Trio Autopilot system designed for Cessna 172 aircraft. Includes everything you need for installation — fully documented and supported by our technical team.