As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN SIDE, LT BRAKE FEELS MUSHY AND TRAVELS TO THE FLOOR BEFORE ENGAGING THE BRAKE. COPILOTS BRAKES APPEAR NORMAL. PERFORMED BLEEDING PROCEDURE FOR THE BRAKE MASTER CYLINDER. PEDAL TRAVEL IS NOW EQUAL ON THE PILOT SIDE LT AND RT PEDAL. NO FURTHER ACTION REQUIRED AT THIS TIME, REF MM 34-42-00.