Co Guardian Aero Panel Mount Multi-Function Co Detector Clock/Timer And Cabin Pressure 553-101-001 75-7

The Guardian Avionics AERO 553 is a panel-mounted, multi-function carbon monoxide (CO) detector for cockpit installation. Identified as 553-101-001 and manufacturer part number 75-7, it combines CO monitoring with practical flight-deck timekeeping and aircraft-status functions in a compact instrument-panel format.

The unit is designed to provide displayed CO readings and audible/visual alerts, while also offering local and Zulu time, an automatic or manually started flight timer, and a stopwatch. Additional functions documented for the AERO 553 include aircraft voltage monitoring and cabin-altitude-related indications. Outside-air-temperature functionality requires the applicable external OAT probe.

• Panel-mounted AERO 553 multi-function CO detector
• CO level indication with cockpit alerts
• Local and Zulu clock display
• Flight timer and stopwatch functions
• Aircraft voltage monitoring
• Cabin-altitude-related monitoring and alerts
• Manufacturer part number: 75-7
• Product reference: 553-101-001

Refer to the applicable AERO 553 installation, operating and continued-airworthiness documentation when assessing installation requirements and the approval basis for a particular aircraft.