As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRFRAME VIBRATION FELT AF VIBES FELT FROM T/O, TO DESCENT , WENT AWAY ON FINAL APPROACH. FELT IN REAR ON LT SIDE OF THE AC EVIDENT AT ROW 13 BUT NOT EVIDENT IN LAV. REMOVE AND REPLACED HYDRAULIC COOLER REF AMM 29-11-42, OPS CHECK GOOD. (K)