As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 127 - KIAH-KBRO - AFTER GEAR RETRACTION A STRONG VIBRATION WAS FELT IN THE NOSE GEAR AREA. RETURNED KIAH. MAINTENANCE FOUND THE RT NOSE GEAR DOOR OPEN. MAINTENANCE INSPECTED THE NOSE GEAR AND FOUND NO DEFECTS. THE NLG RETRACT SYSTEM OPERATED NORMALLY DURING OPERATIONAL CHECK. (M)