As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MODERATE AIRFRAME VIBRATION FELT MAINLY IN THE FRONT OF THE AIRCRAFT AFTER FLAP AND GEAR RETRACTION. *S/D* AIRFRAME VIBRATION CONDITIONAL INSPECTIONS AND VIBRATION INSPECTIONS OF THE NR 1 ENGINE WERE ACCOMPLISHED. ALL FLIGHT CONTROLS WERE WITHIN INSERVICE LIMITS. NR 1 ENGINE REQUIRED A FAN BLADE LUBE. THE EQUIPMENT COOLING AUTOMATIC OUTFLOW VALVE WAS REPLACED AS A PRECAUTION. OP CHECK OK.