C182 pilot reported an electrical failure and loss of radio and transponder on a flight through clas...

Attributes
ACN	1489987
Time
Date	201710
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	VFR
Component
Aircraft Component	Electrical Power
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 275 Flight Crew Type 165
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Other / Unknown

Narrative:

Entire flight was with radio and transponder using flight following. I was in contact with ZZZ approach as I neared the outer edge of ZZZ1 airspace I heard ZZZ approach calling me (I assume to change frequency to ZZZ1 approach). I responded to them but they could not hear me. After several tries I switched frequency to ZZZ1 approach and called them; they also could not hear me; thinking I had a radio issue I set transponder to 7600 and pinged. No response. I was at this point at 3500 ft altitude; just inside ZZZ1 outer ring about 25 miles out. At this point I noticed all the radio and transponder lights dimming and going out; I reduced my elevation to 1500 ft and using my cell phone called the tower to notify them of my altitude and location; I stayed below the class B airspace and landed at ZZZ2 to assess what repairs were needed.

Original NASA ASRS Text

Title: C182 pilot reported an electrical failure and loss of radio and transponder on a flight through Class Bravo airspace. He elected to divert to a nontowered airport.

Narrative: Entire flight was with radio and transponder using flight following. I was in contact with ZZZ approach as I neared the outer edge of ZZZ1 airspace I heard ZZZ Approach calling me (I assume to change frequency to ZZZ1 Approach). I responded to them but they could not hear me. After several tries I switched frequency to ZZZ1 Approach and called them; they also could not hear me; thinking I had a radio issue I set transponder to 7600 and pinged. No response. I was at this point at 3500 ft altitude; just inside ZZZ1 outer ring about 25 miles out. At this point I noticed all the radio and transponder lights dimming and going out; I reduced my elevation to 1500 ft and using my cell phone called the tower to notify them of my altitude and location; I stayed below the Class B airspace and landed at ZZZ2 to assess what repairs were needed.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

C182 pilot reported an electrical failure and loss of radio and transponder on a flight through class bravo airspace. He elected to divert to a nontowered airport.