As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PACK R EICAS ADV MSG DISPLAYED. FOLLOWED FLT MANUAL CHECKLIST 14.70.39, SELECTED RT PACK TO OFF. AHM PROGRAM DETECTED FAULT MSG 21-24304 FLOW CTL VALVE LOWER PROXIMITY SWITCH FAULT. SEVERAL PREVIOUS W-U. RPL LWR FCV(V21514) OR APPLY APPROPRIATE MEL BEFORE FURTHER FLIGHT. REPLACED LWR RT FLOW CONTROL AND SHUTOFF VALVE, OPS AND LEAK CHECK OK.