Challenger 300
Flight Crew Air Transport Pilot (ATP)
Distraction; Confusion; Troubleshooting; Workload
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Became Reoriented; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification
Aircraft; Environment - Non Weather Related
I was the Pilot Flying on a reposition flight. Shortly after entering the cruise phase of flight; the left generator failed and load shed off the system. The PNF and I ran the appropriate abnormal checklist but ran into some difficulty due to some other electrical issues occurring. We did not declare an emergency because we were able to get the APU generator online. At the same time ATC issued us instructions from our assigned route to turn direct to the ZZZ airport after ZZZZZ intersection. As the pilot flying and working the radios during the abnormal checklist; I acknowledged the instructions and proceeded to reprogram the FMS accordingly. We were within a few miles of ZZZZZ intersection so as I programmed in the new routing we began the turn. ATC then asked if we were turning towards the airport which I replied we were. She then stated that we needed to turn back towards ZZZZZ then to the airport was we were getting to close to [a restricted area]. I stated we were past the intersection but she showed us 2 miles west. We were also informed of GPS abnormalities reported in the area and that a discrepancy in our location would not be unusual. We were then instructed to proceed direct to ZZZZZ1 to transition to the approach. The rest of the flight concluded uneventfully.The first thing we should have done was make ATC aware that we were dealing with an electrical issue even though it was not an emergency. I think if they had known; we would not have been loaded up with routing changes at that moment. I also should have focused solely on my task of flying the aircraft and working the radios and FMS instead of half listening the PNF running the checklists and working the electrical issue. I believe I became task saturated by thinking I needed to hurry in my reprogramming the FMS and may have inadvertently proceeded direct to the airport initially instead of the assigned fix and then to the airport. There was no need to rush and by asking for vectors and looping ATC into our electrical situation I could have kept the workload down and focused on one task at a time.
CL300 pilot reported the left generator failed and possible GPS interference. These anomalies led to a course deviation which was resolved with assistance from ATC.