What was found
WHEN BRAKE PRESSURE IS APPLIED THERE IS NO RESPONSE FOR THE FIRST 2-3 INCHES OF BRAKE PEDAL MOVEMENT THEN THE BRAKES GRAB HARD ENOUGH TO THROW PAX AND CREW FORWARD. BRAKES TEMPS LESS THAN 100 DEGREES. TROUBLESHOT, WHEN BRAKE PRESSURE IS APPLIED THERE IS NO RESPONSE FOR THE FIRST 2-3" OF BRAKE PEDAL MOVEMENT. PERFORMED HYDRO MECHANICAL ANALOG BRAKE ANTISKID CONTROL SYS OPS CHECK WITH NO DEFECTS NOTED AT THIS TIME. WORK DONE IAW GIV-MSG3, CMP 324204. WHILE PERFORMING NORMAL BRAKE SYS, OPS TEST, NOTED RT BRAKE PRESSURE WILL DROP RAPIDLY THEN FOLLOW BY LT BRAKES PRESSURE DROP. WHILE DEPRESSING BRAKE PEDALS TAPPED LIGHTLY ON BRAKE AUGMENTER VALVE ON THE WELL WALL, NOTED BRAKE PRESSURE WILL FLUCTUATE, SUSPECT BAD VALVE. WORK DONE REF GIV MSG-3 AMM 32-43-01. R & R BRAKE AUGMENTOR VALVE. REMOVED VALVE, PN 39-723-1, SN 375 AND INSTALLED O/H VALVE, PN 39-723-1, SN 341. WORK DONE IAW CMP GIV 324272. OPS AND LEAK CHECKS GOOD.