As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD EQPT VAL EICAS MESSAGE IN CRUISE AT FL370. PERFORMED CHECKLIST NON-NORMAL PROCEDURES. VALVE LIGHT REMAINED ON. DESCENDED TO 10000FT. EMERGENCY DECLARED. FACT 30OCT24 17:29 MEM AMM: 21-58-05-4 FIM: 21-58-00-2 T/S PER FIM. PERFORMED FWD EQP VALVES VOLTAGE DROP TESTS ALL VLVS PASS EXCEPT OVERBOARD EXH VLV. OVERBOARD VLV FAILED TESTS. R & R OVERBOARD VLV. OPS CK OK.