What was found
EMERG BRAKE: EMERGENCY BRAKE PRESSURE DROPPED TO ABOUT 1600 PSI IN FLIGHT, AND THEN RETURN BACK TO NORMAL 3000 PSI UPON LANDING. // SIGNOFF// FOLLOWED EMB-505 FIM TASK 32-43-00-810-802-A REMOVED AND REPLACED EMERGENCY BRAKE VALVE WITH SERVICEABLE UNIT IAW EMB 505 AMM 32-43-02-400-801-A REMOVED AND REPLACED EMERGENCY BRAKE THERMAL RELIEF VALVE WITH SERVICABLE UNIT IAW EMB 505 AMM 32-43-08-400-801-A BLED BRAKES IAW EMB 505 AMM 32-43-00-820-801-A/500 OPS CHECK GOOD OPERATED SYSTEM SERVERAL TIMES USING HYDRAULIC POWER CART