What was found
FWD WASTE TANK FAILURES. DUE TO NUMEROUS LAV FAILURES IN FLIGHT PLEASE COMPLETE THE FOLLOWING CALLOUT BEFORE FURTHER REVENUE FLIGHT. REPLACE BOTH POINT LEVEL SENSORS ON THE FWD WASTE TANK CHECK ALL CONNECTORS AND WIRES ASSOCIATED WITH THE WASTE TANK LEVEL SENSORS AND REPAIR AS NEEDED. REPLACED THE LOGIC CONTROL UNIT FOR THE FWD WASTE TANK AND CHECK ALL CONNECTORS AND WIRING ASSOCIATED WITH THE LOGIC CONTROL UNIT. REPLACED BOTH SENSORS AND LCU IAW MM. REPLACED AFT TANK LCM, CHECKS OKAY