As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AIRWORTHINESS CHECK, FOUND CRACK IN BATTERY COMPARTMENT DOOR FRAME, UPPER AFT RADIUS ON L/H SIDE OF TAILBOOM. REMOVED PAINT AND CONFIRMED SUSPICION ON CRACK THROUGH DOUBLER AS WELL AS SKIN UNDERNEATH AS SEEN FROM INSIDE THE TB WITH MIRROR.