What was found
ON LANDING ACFT PULLED LT DURING PILOTS BRAKE APPLICATION. DURING TAXI WITH JUST LT BRAKE PEDAL APPLICATION ACFT STARTS TO BRAKE SMOOTHLY THEN GRABS & JERKS ACFT TO LT. RT BRAKE PEDAL APPLICATION APPEARS NORMAL & BRAKING FROM RT PILOTS SIDE IS NORMAL. THERE IS AN INTERMITTENT HIGH PITCH MOAN FROM THE LT SIDE PEDAL DURING BRAKE APPLICATION. R & R NR 3 BRAKE IAW CMP 32-43-03. PERFORMED ACFT BRAKE BLEEDING PROCEDURE ON NR 1 & NR 2 BREAK IAW MM 32-40-20. SERVICED RT HYD RESERVOIR. OPS CHECK GOOD. TAXI CHECKED ACFT, TAXI CHECKED GOOD.