MA-1 System Checkout: Upon completion of DIT-MCO circuit analysis and MA-1 component installation, the aircraft receives a complete MA-1 systems alignment and checkout. Special provisions are made for air-conditioning of the electronic equipment during this phase. Console arrangements for special test equipment provide a convenient dock arrangement with areas kept clean and dust free as possible for this function. SM-ALC, McClellan AFB, CA. Depot PDM MODs.