What was found
FWD LAV AND ACFT RH AFT LAV UNABLE TO FLUSH IN FLT NOTED WASTE LEVEL INDICATOR INDICATING FULL.UPON LANDING INDICATOR INDICATED 1/2 FULL SERVICED REPEATED THEY REMOVED 1/4 WASTE. GROUNDED - YES. DIVERSION -- SERVICED WASTE TANK MULTIPLE TIMES REF B737-800 AMM 12-17-01 NO DEFECTS NOTED WASTE LEVEL INDICATOR SHOWS EMPTY. FLUSHED ALL LAVS WITH NO DEFECTS NOTED. REF AMM 38-32-00 A/C OK FOR SERVICE. AFTER COMPLETING RESOLUTION ALL LAVS WENT INOP. ACCOMPLISHED LAV INOP BITE REF B737-800 FIM 38-30 TASK 802 WITH NO FAULTS FOUND. INSPECTED VACUUM WASTE BLOWER VACUUM WASTE CONTROL AND VACUUM WASTE C/B WITH NO DEFECTS NOTED LAV A,G,AND E HAVE RINSE BUT NO VACUUM LAV D HAS A WEAK FLUSH. ACCOMPLISHED WASTE TANK LINE BLOCKAGE REMOVAL AMM 38-32-00 WASTE TANK PER AMM 12-17-01 ALL LAVS FLUSH NORMAL LAV INDICATIONS NORMAL. (REF ASA LP 60437043)