Date: 202007
Local time of day: 1801-2400
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: Airliner 99
Operator: Air Carrier
Operating under: Part 135
Flight plan: IFR
Mission: Cargo / Freight / Delivery
Flight phase: Climb
Airspace: Class B ZZZ
Aircraft component: Electrical Power
Component problem: Malfunctioning
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Instrument; Flight Crew Commercial; Flight Crew Multiengine
Anomaly: Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: Air Traffic Control Provided Assistance; Aircraft Aircraft Damaged; Flight Crew Diverted; Flight Crew Landed in Emergency Condition; General Maintenance Action
Contributing factors: Aircraft
Primary problem: Aircraft

Narrative: I was at ZZZ about to depart toward ZZZ1. I started my engines and then realized that I had not yet called for release. I shut both engines back down; and called Dispatch to obtain my release. I then restarted my engines and everything appeared to be functional. There were no abnormal annunciators. The wind was very strong; gusting up to approximately 30 knots from the south/southeast; so I made the decision to back taxi on Runway XX; so I could take off from Runway XY. I took off Runway XY and at this point everything was normal. When it was time to raise my landing gear; I noticed that it didn't seem to come up. As I increased speed I tried to trim down; and the trim was not responding. It was at this point that I realized there was an electrical problem. I leveled off at 4;000 feet and began to troubleshoot. After a minute or two; my GPS and transponder shut off. I ran through all of the checklists and checked all circuit breakers. My battery was only showing 10 volts. I then decided to start from the beginning by shutting off every electrical switch in the aircraft. I started with turning the battery master back on; and when I did; the avionics came on with the battery master (avionics switch was off). I made several attempts to reset the generators with no success. I was supposed to pick up cargo in ZZZ1; but I knew that if I shut off my engines after landing at ZZZ1 that they would not restart and the aircraft would be stranded with cargo onboard. I then contacted NAME1; and NAME1 stated she would pick up my cargo at ZZZ1 so I could take the aircraft back to ZZZ2. With the battery on I could monitor the radio; I just did not have enough electricity to transmit. I figured the safest course of action would be to remain at a low altitude (approximately 4;000 feet) and fly toward ZZZ2. I believe that NAME1 contacted ZZZ2 tower and informed them of my situation. As I neared approximately 25nm from ZZZ2 I made a PIC decision to call the tower on my cell phone as I felt that calling them would be safer than coming in with no communication at all. I did attempt to transmit over my radio however they could not read me. ZZZ2 Tower cleared me to make a right base and land Runway XYL and taxi to FBO. As I was nearing the airport I performed the emergency gear extension checklist just to make sure that my gear was down and locked. I also performed the no flap landing checklist as my flaps were at 0%. The landing was uneventful and I taxied my aircraft to FBO. NAME2 from maintenance met me in the parking lot and began to perform checks on the aircraft. I notified NAME1 that I had arrived safely; and I then drove my packages from ZZZ to the Company ramp to drop them off. NAME1 delivered my ZZZ1 cargo that she picked up. I left a message with NAME3; and I called maintenance control to discuss the aircraft. Name2 checked the aircraft and I believed it was found to be functional after I landed and shut it down. I later received a call from NAME1 and discussed the items that are listed above. As I understand the aircraft is now back in service with no damaged items. At no time during this flight did I feel that anything was unsafe. The weather was clear; the condition of the aircraft was not deteriorating; the safety of the flight was never in question; and I did everything I could to get my cargo to ZZZ2 as safely as possible and not leave the aircraft stranded away from base. Due to these factors I did not request priority.I became aware of the event for sure when the trim was not functioning after takeoff.I am unsure of exactly what caused this event. I have a feeling that restarting the engines after calling for release had something to do with it. I performed my flows and checklists; however there is always a possibility that I missed something somewhere.




Synopsis: Airliner 99 pilot reported loss of electrical power resulting in a diversion.