What was found
BLEED FAMV RT RT ENGINE BLEED FAN AIR MODULATING VALVE (FAMV) FAILED OPEN OR CLOSED, OR RT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. CHECKED FAULT HISTORY WHICH SHOWED 1ST HIT 3 LEGS AGO (MSG 36-10532). T-S REF FIM. CK'D ASCPC S-N & MOD LABEL WHICH WAS CURRENT, MAT TEST SHOW FAULT ACTIVE. FOUND ONLY 3.1 VAC DV36118. RPLD ASCPC & THEN CK'D DV36118 PIN 1 & 2--GOT 5.0 VAC BUT MAT TEST STILL FAIL. PIGGYBACK SERVICEABLE FAMV & MAT TEST PASSED. NEED TO REPLACE FAMV. REPLACED FAN AIR MODULATING VALVE, GROUND CHECKS GOOD.