Repairing Aspen Evolution glass cockpits on piston engine airplanes is a specialized task that requires a methodical approach, beginning with diagnostics and adhering strictly to manufacturer guidelines. The system is designed with redundancy and is known for its ability to retrofit into traditional “six-pack” instrument holes.
TROUBLESHOOTING ASPEN EVOLUTION FAILURES
Aspen Evolution systems often provide clear indications of a problem, but it’s crucial to understand the cause before attempting a repair. Common failures and troubleshooting strategies include:
- Blank or Flickering Screen: This is frequently a power-related issue. The system has an internal backup battery, but a flickering screen or an unexpected shutdown points to a problem with the aircraft’s electrical system, wiring, or a loose connection. A technician will check the avionics bus voltage and inspect the wiring harness for signs of chafing, corrosion, or loose pins.
- “X” or Flagged Data: When a red “X” appears over an instrument like the attitude indicator or airspeed tape, it signals a sensor failure. The Aspen Evolution system has an integrated Air Data Attitude Heading Reference System (ADAHRS). The fault log, which can be accessed through the system’s menu, will usually provide a specific code to pinpoint the failing component, which could be the ADAHRS itself or the Remote Sensor Module (RSM).
- Navigation and GPS Issues: Problems with GPS or navigation data can be caused by a faulty GPS antenna, a corrupted navigation database, or an interface issue with an external GPS unit. The technician will check the antenna’s connections and verify the system’s database to ensure it’s up to date.
REPAIR PROCEDURES AND BEST PRACTICES
The principle of authority is paramount when repairing an Aspen Evolution system. Only a certified avionics technician with specific training on the system should perform repairs. They must follow the detailed instructions in the Aspen Evolution Installation Manual and all relevant service bulletins.
- Fault Isolation: Using the system’s diagnostic logs, the technician will isolate the exact cause of the failure. This ensures that the correct component is replaced, saving time and money.
- Component Replacement: If an LRU (Line Replaceable Unit) like the PFD or RSM needs to be replaced, the new component must be a certified part from an authorized dealer. The installation process is meticulous, requiring proper mounting, wiring, and configuration.
- Software and Configuration: After a component is replaced, the system’s software and configuration must be verified. This ensures the new component is compatible and integrates seamlessly with the rest of the system.
- Final System Testing: The final step is a series of rigorous ground and functional checks. This includes verifying all flight instruments, engine monitors, and navigation displays are working correctly.
We have built our reputation on a foundation of social proof—a long history of satisfied customers across California, Arizona, and Nevada who trust us with their avionics. Our unique selling proposition is being the only 24/7 maintenance center in the area. When a critical glass cockpit issue grounds your aircraft, our round-the-clock availability allows us to begin the diagnostic and repair process immediately, minimizing downtime and getting you back in the air with confidence. A consistent and proactive maintenance schedule is the best way to prevent these issues from happening in the first place.
FOOTNOTES
- Aspen Avionics. “Instructions for Continued Airworthiness.” https://aspenavionics.com/images/resources/900-00012-001_AD_EFD_ICA_External_Internal_Battery_Extension.PDF
- Aspen Avionics. “Evolution Flight Display System AFMS.” https://salt.aero/wp-content/uploads/2018/05/EFD-System-900-00008-001-AD-AFMS.pdf
- Aviation Institute of Maintenance. “Glass Cockpit Maintenance.” https://www.aviationmaintenance.edu/blog/glass-cockpit-maintenance/
- The Aviation DataBase. “Service Information: Aspen Avionics.” https://www.airresearch.com/features/service_bulletins.php/Aspen
The Aero Center is located at William J. Fox Airfield KWJF | Lancaster, CA. Contact us at 209.885.6950 for questions or appointments.