Cessna 150
Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 72; Flight Crew Total 750; Flight Crew Type 600
Time Pressure; Communication Breakdown; Troubleshooting; Workload
ATC Issue All Types; Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Fuel Issue
Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification; General Maintenance Action; General Flight Cancelled / Delayed
Aircraft
Departed ZZZ1 for ZZZ2 4h 14 min flight with full main and auxiliary tanks 3h 45min and 2hr 25 min endurance respectively.Activated fuel transfer after 2 hrs of flight unaware there was insufficient electrical power to pump the fuel. About an hour later I Experienced complete electrical failure with loss of all communication/ GPS and unable to pump fuel from auxiliary to main tanks with fuel tank reading empty.ATC indicated that my transponder had failed and asked me to recycle it. They were unable to hear my transmission on a hand held radio. I tried Guard 121.50 without response.I saw there was no traffic in my vicinity on my iPad and descended from my assigned altitude towards the nearest airport ZZZ broadcasting at Tower frequency alternating with 121.50. Close to ZZZ; I could hear the controller intermittently. I continued to broadcast my situation and radio failure. The Controller told me that he could hardly hear me and that radio failure was not urgent. As I descended toward Runway XX he asked me to go-around. I replied unable and landed. I asked for progressive taxi to the closest FBO and he told me that was not urgent either and asked me to hold were I was.I waited until a maintenance vehicle came to me and I explained my situation and he directed me to the closest maintenance facility were my engine started to stutter from fuel exhaustion. The mechanic confirmed alternator failure with depleted battery and ordered a replacement alternator and removed my battery for charging.
Cessna 150 single pilot reported an alternator failure during cruise causing multiple electrical issues. Pilot requested priority handling and executed a mechanical diversion to a safe landing.