As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE AIR-GND DISAGREE MSG AND IN CRUISE AND HEARD A CLUNK NOISE IN NOSE GEAR AREA, SIMILAR TO NOSE GEAR COMING DOWN ON DOORS, GEAR HANDLE HAD ALREADY BEEN MOVED TO OFF EARLIER THAN WHEN THE NOISE OCCURRED PER CREW. SUPPLEMENTAL DATA UPDATE THE PROBLEM IS ATTRIBUTED TO A LEAKING NOSE GEAR STRUT SEAL. REPLACED NOSE GEAR STRUT SEAL.