What was found
NR 2 STALL SYS FAIL AND PUSHER SYS FAIL ILLUMINATED DURING T/O ROLL AROUND A/S 60KT. BOTH C/L WENT OFF DURING TAXI BACK TO THE GATE. MECHANIC REPLACED NR 2 SPM AS SUGGESTED BY BITE "NO DATA FROM NR 2 SPM". AFTER ABOVE MX ACTION, THE ACFT DISPATCHED WITH 1 HR 37 MIN DELAY BUT ELEV FEEL, PITCH TRIM AND AVIONICS C/L ILLUMINATED DURING T/O ROLL AROUND 50KT. ALL C/L WENT OFF DURING TAXING BACK TO THE GATE. FURTHER TROUBLESHOOTING REVEALED. - IOP 2 FAIL MESSAGE ON ED - NO DATA FROM IOP 2 ON BITE. REPLACED INOP NR2 - SHAKING PPSM DUPLICATED THE SNAG. REPLACED PPSM.