As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN CEILING AREA L-4R CRACKED STA 464. REMOVED CRACKED LONGERON 4R FROM STA 439 TO 470RT IAW DC9/MD80 SRM 53-02 PG 49-56. INSTALLED REPLACEMENT LONGERON SECTION FROM STA 439 TO 470 (4R) IAW DC9/MD80 SRM 53-02 PG 99 THRU 56 AND DC9/MD80 SRM 51-30-2. DURING HMV AT SAA/SAT.