As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RECEIVED NOSE DOOR OPEN WARNING MESSAGE & GEAR DISAGREE WARNING MESSAGE. RETURNED TO MKE. FLT#7333 FOUND NLG STRUT NOT FULLY EXTENDED CAUSING WOW & CENTERED PROXY SENSORS TO NOT READ. LOWERED NLG & PERFORMED FULL STRUT SERVICE. PERFORMED SEVERAL RETRACTION EXTENSIONS OF LANDING GEAR INCLUDING AN EMERGENCY EXTENSION IAW AMM.