As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AUTO FAIL ON PRESSURIZATION PANEL ILLUMINATED AT FL 370; AIRCRAFT DIVERTED TO AND LANDED SAFELY AT MSY. REMOVED AND REPLACED AUTO FAIL RELAY R557 (AALA202405135796) AND R556 (AALA202405144425). PER WDM 21-31-22. ACCOMPLISHED PRESSURIZED AIRCRAFT OPERTIONAL CHECK GOOD. PER AMM 21-31-00.