Technology » Onboard Monitoring System for the 737 MAX

Onboard Tire Pressure and Brake temperature Monitoring System for the 737MAX

737MAX has three options for monitoring tire pressure and brake temperature: 

  1. The TPIS Option is an onboard, continuously monitoring Tire Pressure Indication System (TPIS). The system consists of passive wireless tire pressure sensors using SmartStem® sensor technology, in-axle equipment to communicate with the sensors, and a Tire and Brake Monitoring Unit (TBMU) for communicating to the cockpit and displaying tire pressure in the flight deck.

  2. The BTMS Option is the Brake Temperature Monitoring System (BTMS). This system consists of a Tire Brake Monitoring Unit (TBMU) that processes brake temperature provided by a thermocouple mounted in the brake structure and displays brake health performance in the flight deck.

  3. The TBMS Option combines the benefits offered by the TPIS with the new adaptive BTMS into a Tire Pressure and Brake Temperature Monitoring System (TBMS). This option includes all of the equipment in the TPIS and BTMS systems. It more accurately provides fuse plug temperature through the use of both the temperature reported by the thermocouple mounted in the brake structure, and the temperature reported by the tire pressure sensor. The TBMS continuously monitors and displays both brake health and tire pressure in the flight deck.