What was found
IN CRUISE DEICE BOOTS WOULD NOT INFLATE IN SLOW OR FAST MODES DEICE BOOTS INFLATED NORMALLY N MANUAL MODE. RETURNED TO FIELD. LANDING UNEVENTFUL. REMOVED FROM SERVICE. INTERROGATED CDS AND FOUND THE FOLLOWING FAULTS: MONITOR 1#2 FAIL TIMER 3 FAIL REMOVED AND REPLACED TMU REF: Q400 AMM TASK 30-11-01-000-801 , 30-11-01-400-801 C/W FUNCTIONAL CK OF THE AIRFRAME DICING SYSTEM REF: Q400 AMM 30-11-00-720-801 OPS CK GOOD DE-ICE SYSTEM WORKS GOOD ON ALL MODES OF OPERATION NO OTHER DEFECTS FOUND AT THIS TIME ALL FAULTS CLEARED ON CDS AND DID NOT RE-APPEARED. AIRCRAFT RETURNED TO SERVICE.