N747JB
Final Approach
That was my theory too, I probably wouldn't notice the ADF or transponder or even the KX155 being swapped, unless the 155 display all lit up. But, I would notice the 530 not having my flight plans stored!
Transponder maybe. I'd think you'd notice if the saved routes and waypoints in your GPS had changed or if the saved frequencies in your radios had changed.
I kinda doubt that the legendary teef woudfl take to time to copy all of that.