As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN APPLYING LEFT BRAKE AT ALL SPEEDS VIBRATION + SOFT RUMBLING SOUND HEARD. REMOVED FROM SERVICE. JACKED L/H MLG. PERFORMED GVI OF WHEEL & BRAKE ASSEMBLIES, WHILE ROTATING. NO DEFECTS NOTED. INSPECTED MLG DAMPENER. NO DEFECTS NOTED. PERFORMED TAXI CHECK OF A/C. APPLIED BRAKES NUMEROUS TIME WITHOUT INDICATION OF VIBRATION OR FLUTTER NOTICED, COULD NOT DUPLICATE. NO DEFECTS NOTED AT THIS TIME RETURNED TO SERVICE.