As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU - FLT 2296 - FLIGHT DEPARTED SJU WITH THE RIGHT PACK ON MEL. AFTER TAKEOFF, THE LEFT ENGINE BLEED TRIPPED OFF. CREW SWITCHED TO APU AND THEN BACK TO LEFT ENGINE BLEED BUT THE BLEED TRIPPED OFF AGAIN. CAPTAIN ELECTED TO RETURN TO FIELD AT SJU. FLIGHT LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. (M)