Troubleshoots, repairs, overhauls, and performs preventive maintenance on critical airport assets such as Passenger Boarding Bridges (Jet Bridges), 400 Hz Aircraft Ground Power Units (GPUs), Aircraft Pre-Conditioned Air Units (PCAIRs), and related Heating, Ventilation, and Air Conditioning (HVAC) systems. Uses test equipment including digital volt ohm meters (DVOMs), amp probes, digital storage oscilloscopes (DSOs), reactive and resistive load banks, Maintains, repairs, disassembles, adjusts, and reconditions heating, ventilation, and air conditioning systems and components such as compressors, condensers, pumps, receivers, evaporators, and thermostatic coils.