As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING A 100 HOUR INSPECTION A .5 INCH CRACK WAS FOUND RADIATING FROM THE LIGHTENING HOLE IN .063" STEEL COVER/SPLICE PLATE, P/N 391-020-305-2 BOLTED TO FORWARD SIDE OF HORIZONTAL STABILATOR CENTER BOX/SPLICE STRUCTURE. THIS STRUCTURE ATTACHES THE LEFT AND RIGHT HORIZONTAL TAIL ASSEMBIES (P/N'S 250-020-001-0 AND -1) TOGETHER.