As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED 2 NEW BELTS (1 SPARE) ON AIRCRAFT, FIRST PROBLEM, NO DIRECTION OF ROTATION OR ARROW ON BELT. SECOND PROBLEM WAS BELT BROKE OR DELAMINATED AT GLUE JOINT (SEAM) ON FIRST RUN. AFTER INVESTIGATING, DETERMINED BELT WAS INSTALLED PROPERLY. SUBMITTER RECOMMENDATION: DIRECTION OF ROTATION ARROW PRINTED ON BELT. ALSO, RECOMMEND TRACKING BATCH.