What was found
FAT - ON TAXI FOR FLIGHT 2453 SPLR/STAB FAULT & RUD LIMIT FAULT STATUS MSGS KEEP CYCLING ON AND OFF. RETURNED TO THE GATE. REMOVED AND REPLACED ISI PER CRJ700 AMM 34-12-01-000-801-A01 AND 34-12-01-400-801-A01. PERFORMED PITOT LIN P3 CONTAMINATION REMOVAL PER TR 34-0089 34-11-00-100-803-A02. REMOVED STATIC LINE S3 CONTAMINATION PER 34-11-00-100-806-A01, NO CONTAMINATION NOTED ON S3 OR P3. PERFORMED OPS TEST OF ISI PER CRJ-700 AMM 34-12-01-710-801-A01, NO DEFECTS NOTED. PERFORMED MTC R341101 PITOT/STATIC LEAK CHECK, NO LEAKS NOTED. PERFORMED SPOT TESTS SPLR/STAB FAULT CLEARED AND RUD LIMIT FAULT. AIRCRAFT RETURNED TO SERVICE.