This SAE Aerospace Recommended Practice (ARP) provides recommendations for the function, design, construction, and testing of an on-aircraft Brake Temperature Monitoring System (BTMS), sometimes referred to as a Brake Temperature Indication System (BTIS). NOTE: This ARP does not address:

• Cockpit ergonomics and Aircraft operating procedures.
• Various handheld methods of temperature sensing or readouts, as these are not associated with transport aircraft during normal operation.
• Temperature sensitive paints as a means to indicate exceedance of a landing gear axle temperature threshold due to brake temperature.