As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WHEN GEAR WAS RETRACTED LOUD VIBRATION IN NOSE GEAR AREA. NO UNSAFE INDICATIONS ON GEAR. EXTENDED GEAR AND VIBRATION STOPPED. FLIGHT RETURNED AND LANDED WITHOUT INCIDENT. UPON RETURN TO GATE FOUND RIGHT NOSE GEAR DOOR OPEN. NOSE GEAR STRUT FLAT AND MAIN GEAR STRUTS UNDERSERVICED. SERVICED ALL STRUTS AND ADJUSTED NOSE GEAR DOOR DRIVE RODS. GEAR OPERATION CHECKS GOOD.