About this episode
This experience was a good one! (At least looking back in 2020 hindsight.)
We had to dig deep to fix this one!
I was about to give up and started thinking it might be time to take the airplane somewhere else for troubleshooting and repair.
Thankfully Richard, our chief pilot, didn’t give up so easy and he encouraged us to dig deeper before giving up.
With the guidance of “Smitty,” an air conditioning expert at Stevens Aerospace in Greenville, South Carolina, we troubleshot and fixed a problem with our King Air 350 air conditioning system.
He told us we could access the center floor area just aft of the cockpit and ground pin #25 in the circuit board labeled “N1 SPEED / R ICE VANE SENSE” and this would fool the airplane into thinking the right engine was operating, so that we could troubleshoot the air conditioning compressor on the right engine.
We followed Smitty’s directions.
But after grounding pin 25 and powering up the system with the GPU, we found no voltage at the air conditioning compressor wiring plug. (We disconnected the red plug above the compressor to check for power to the plug.)
He then had us remove the right inboard wing leading edge to check the pressure switch in the high pressure line.
This was not the problem.
Smitty also told us there was a
