As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND MACHINED FITTING BETWEEN FRAME 19 AND 20 AT STRINGER 3L TO BE CRACKED. CORRECTIVE ACTION WAS TO REMOVE CRACKED MACHINED FITTING AND INSTALL SERVICEABLE MACHINED FITTING P/N 145-24109-603 BETWEEN FRAME 19 AND 20 AT STRINGER 3L IAW SRM 51-40-02 AND AMM 20-10-01.