As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD FLT 6008 THE CREW REPORTED A LOUD "CLUNK" NOISE WHEN RETRACTING AND EXTENDING THE GEAR. MAINTENANCE INSPECTED AND REPLACED THE EXTEND/RETRACT SOLENOID. THE NOISE CAME BACK ON FLT 5809. MAINTENANCE INSPECTED AND REPLACED THE NOSE LANDING GEAR DOWNLOCK HARNESS (A) W017. OPERATIONAL CHECKS WERE GOOD.