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: RIGHT PACK AMBER ANNUNCIATION ILLUMINATED AFTER TAKEOFF. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. REMOVE AND REPLACED RIGHT HAND PACK PRIMARY DIFFUSER (AALA202502241428), PER AMM 21-53-03. REMOVE AND REPLACED RIGHT HAND PACK FLOW CONTROL (AALA202502242909) AND SHUTOFF VALVE (AALA202502246382), PER AMM 21-51-01. OPERATED BOTH PACKS FOR 30 MINUTES. NO ADDTIONAL FAULTS.