As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM AS A CONSEQUENCE OF "AUTO FAIL" LIGHT TURNED ON. BITE IN PRESSURIZATION CONTROLLER NR 2 WAS PERFORMED AND FAIL CONTINUE. DURING MAINTENANCE REVISION, CIRCUIT BREAKER P6-4 F3 WAS DETECTED ACTIVATED, CIRCUIT BREAKER WAS RESEATED AND LIGHT TURNED OFF, SYSTEM WAS TESTED IAW MM 21-31-00, ALL CORRECT.