DIT-MCO Circuit Analysis: Performed after completion of all modifications and prior to MA-1 system checkout on the aircraft. The total aircraft electronics wiring package is examined for correct voltage capacity, voltage insulation leakage, shorts, grounds, opens, etc. This is accomplished on all aircraft in both F-106 programs through use of a DIT-MCO circuit analyzer and assures a 98% certified wiring package upon which the MA-1 black boxes can be given a high confidence level of good aircraft wiring. SM-ALC, McClellan AFB, CA. Depot PDM MODs.