As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE FLIGHT EXPERIENCED AIRFRAME VIBRATIONS UPON FLAP RETRACTION. STOPPED AFTER LEVEL OFF AND CONTINUED TO DESTINATION. PERFORMED SEVERAL FLAP TESTS, ACCOMPLISHED EFCS1 & EFCS2 ELEVATOR DAMPING AND AILERON DAMPING TEST -NO FAULTS NOTED OPERATIONAL CHECK OK. NO FAULTS NOTED AUTOLAND TEST ACCOMPLISHED SYS CHECKS OK.