As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION WAS NOTED DURING CLIMB & DESCENT ABOVE 320 KTS. CREW STATED, FELT NOT VIBRATION IN FLIGHT CONTROLS OR THROTTLES. INSPECTED ALL DOORS & FLIGHT CONTROLS FOR CONDITION AND SECURITY. NO DEFECTS FOUND. INSPECTED ENGINE VIBRATION ABSORBERS ON NR 1 & NR 2 ENGINES. FOUND NR 1 ENGINE FORWARD UPPER VIBRATION ABSORBER LOOSE. SECURED ABSORBER IAW DC9 MM 71-20-03-2-02-1.