As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASH 6517 LAX - DIVERTED TO LAX BECAUSE THE RIGHT PACK TRIPPED OFFLINE AND THE LEFT PACK IS ALREADY ON MEL. AFTER LANDING CREW SUCCESSFULLY STARTED RIGHT PACK. CONTRACT MAINTENANCE FOUND A LOOSE SENSE LINE ON THE PACK AND TIGHTENED IT. A/C WAS FERRIED TO PHX. 12/14 MAINTENANCE OPS CHECKED, TESTED GOOD THE LEFT PRSOV WAS CHANGED TO CLEAR THE LEFT PACK MEL.