What was found
DURING TAXI WHEN APPLYING BRAKES STUTTERING & GRINDING COULD BE FELT. AS SPEED DECREASED STUTTERING BECAME MORE PRONOUNCED. TAXIED BACK TO RAMP STUTTERING & GRINDING CONTINUED. PARKED & SPEED DECREASED STUTTERING BECAME MORE PRONOUNCED. THIS COULD BE FELT IN BOTH LT & RT BRAKES. CHKD HYD LEVEL & FOUND CORRECT LEVEL IAW AMM 12-13-00-810-802-A. PERFORMED A VISUAL INSPECTION OF LT & RT BRAKE SYS IAW AMM 32-45-21-210-801-A. FOUND LT BRAKE WEAR PIN AT 1/32ND. AIR WAS PRESENT WHEN BLEEDERS OPENED ON BRAKES. REPLACED WITH OVERHAULED LT BRAKE & BLED BOTH BRAKES AGAIN. PERFORMED A TAXI CHK & NO STUTTERING OR GRINDING WAS HEARD WHEN THE BRAKES WERE APPLIED. WORK IAW AMM 32-45-21. OPS & LEAK CHKD GOOD.