Flight crew reported that they diverted due to an electrical problem.

Attributes
ACN	1761290
Time
Date	202009
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 135
Flight Phase	Cruise
Route In Use	Oceanic
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 5000 Flight Crew Type 70
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 4300 Flight Crew Type 2000
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Track / Heading All Types

Narrative:

During cruise flight and 10 minutes after coast out (80 NM east of zzzzz); dadc#1 failed resulting in a popped circuit breaker (DADC1) and noticeable fumes of burned electrical wire. After consulting with the captain we decided to discontinue our oceanic crossing and divert to our departure airport ZZZ. Initially the captain took control and we initiated a 45 degree right turn to leave our cleared course and initiate a descent to FL270 approximately 4-5 NM off course due to the smell of fumes. We ran the erc items and maneuvered for a 25-30 NM parallel course northwest to the coast out fix zzzzz and contacted ZZZ radio for a clearance back to ZZZZ. Our clearance was to FL270 which we had reached by the time we received our clearance. Shortly after I received the controls back from the captain and the rest of the flight remained uneventful. We elected not to declare an emergency because the fumes/odor subsided and we received direct ZZZZZ1 for the ZZZZZ1 1 arrival which was a straight course to the airfield and the traffic congestion was sparse; furthermore; ZZZ was the closest airfield and we didn't need emergency equipment standing by on arrival.

Original NASA ASRS Text

Title: Flight crew reported that they diverted due to an electrical problem.

Narrative: During cruise flight and 10 minutes after coast out (80 NM East of ZZZZZ); DADC#1 failed resulting in a popped circuit breaker (DADC1) and noticeable fumes of burned electrical wire. After consulting with the Captain we decided to discontinue our oceanic crossing and divert to our departure airport ZZZ. Initially the Captain took control and we initiated a 45 degree right turn to leave our cleared course and initiate a descent to FL270 approximately 4-5 NM off course due to the smell of fumes. We ran the ERC items and maneuvered for a 25-30 NM parallel course Northwest to the coast out fix ZZZZZ and contacted ZZZ Radio for a clearance back to ZZZZ. Our clearance was to FL270 which we had reached by the time we received our clearance. Shortly after I received the controls back from the Captain and the rest of the flight remained uneventful. We elected not to declare an emergency because the fumes/odor subsided and we received direct ZZZZZ1 for the ZZZZZ1 1 arrival which was a straight course to the airfield and the traffic congestion was sparse; furthermore; ZZZ was the closest airfield and we didn't need emergency equipment standing by on arrival.

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.