What was found
ON TAXI OUT- NUMEROUS UNRELATED FAILURES OCCURRED: LNAV/VNAV DROPPED OFF LINE 3 TIMES. AUTOTHROTTLE TRIPPED OFF. RUNWAY DROPPED OUT OF FMC, THEN ROUTE DROPPED ATC COMM TERM MESSAGE CAME UP, PLUS ALL TAKEOFF PERF DROPPED OFF. GROUNDED - YES. ACCOMPLISHED DFCS BITE PER B737-800 FIM 22-11 TASK 801, MMR BITE PER FIM 34-31 TASK 801 & AUTOTHROTTLE BITE PER FIM TASK 22-34-801. NO FAULTS DETECTED. NO CURRENT FAULTS ON PSEU, ACCOMPLISHED PSEU SELF TEST, NO FAULTS, TEST PASSED. ACCOMPLISHED L & R ADIRS BITE TEST FIM 34-61 TASK 824 & FMS BITE PER FIM 34-61 TASK 801 NO FAULTS NOTED. NO HISTORY, OK FOR SERVICE.