As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE MAINTENANCE VISIT A CRACK WAS DISCOVERED IN AFT EQUIPMENT BAY (APU AREA) AT FRAME NR 4 RIGHT SIDE. CRACK WAS REPAIRED IN NR 4 FRAME IN ACCORDANCE WITH DEHAVILLAND REPAIR DRAWING. REPAIR FABRICATED AND INSTALLED PER RD8-55-199. EDDY CURRENT INSPECTION FOR ADDITIONAL CRACKS COMPLETED AND NO CRACKS WERE FOUND. AIRCRAFT RETURNED TO SERVICE.