As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPEAT WRITEUP. HIGH PITCH NOISE FROM NOSE GEAR ON GROUND DURING HIGH SPEEDS. NO SHIMMY OR VIBRATION OR DIRECTIONAL CONTROL PROBLEMS NOTED. POST FLIGHT REVEALS NO APPARENT DAMAGE TO NOSE GEAR ASSEMBLY. CORRECTIVE ACTION: REMOVED NLG SHOCK STRUT WITH NLG SHOCK ABSORBER ASSY. INSTALLED "NEW" NLG SHOCK STRUT , WITH NLG SHOCK ABSORBER ASSY. ALL WORK PERFORMED IAW EMBRAER AMM 32-21-01.