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: BOTH IRS FAILED AFTER TAKEOFF, AIRCRAFT RETURN TO AND LANDED SAFELY AT MBJ. **SUPPLEMENTAL REPORT FOR (AALA202402269798): REMOVED AND REPLACED (ADIRU) AIR DATA INERTIAL REFERENCE LEFT (AALA202402269798) AND (ADIRU) AIR DATA INERTIAL REFERENCE RIGHT (AALA202402276369), PER AMM 34-21-01. ALL REQUIRED TEST PASSED. REMOVED AND REPLACED ISDU (AALA202402270569), PER AMM 34-21-02. ALL REQUIRED TESTS PASSED**(CLOSED).