As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1476, SJU- STT. (AIRCRAFT PERFORMED AN AIR TURN BACK TO SJU) ' AFTER DEPARTURE IN CLIMB THRU ABOUT 3000' CAB PR SYSTEM 1 FAULT. AT ABOUT 7000' MASTER WARNING CAB PR EXCESS CAB ALT; REMOVED AND REPLACED CPC #1 FIN #11HL IAW AMM 21-31-34. OPS CHECK OK.'