Specialized Experience or training installing, maintaining, repairing and modifying electrical systems and major substation components of electrical system. Experience diagnosing malfunctions and determining remedy when complex relationships exists among different electrical system circuits requiring knowledge of all electrical units and systems. Experience making electrical repairs that require the use of precision measuring equipment and common hand tools. Experience in the setup and operation of computerized multiple circuit analyzing equipment in manual, semiautomatic, or automatic mode to run existing and new (not fully debugged) diagnostic programs to test and analyze aircraft electrical circuitry and interconnecting cabling of systems such as navigational computers, radar, and related equipment and to repair discrepancies. Must have at least 12 months of specialized equivalent experience to the next lower grade level.