As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD RHYTHIMIC BANGING NOISE FROM NOSE WHEEL AREA AFTER RETRACTING GEAR ON TAKE OFF. GEAR INDICATED UP. NOISE WENT AWAY AFTER GEAR WAS DOWN. NO RELATED NLG CMC MESSAGES. REMOVED AND REPLACED NLG UPLOCK BOX IAW AMM 32-33-07. LANDING GEAR NORMAL AND EMERGENCY RETRACTION/EXTENSION CHECKED GOOD.