C402 flight crew reported alternator failure and returned to departure airport.

Attributes
ACN	1633657
Time
Date	201904
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	AC Generator/Alternator
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Left alt light illuminated nearing top of climb; load share was normal. After 5 mins left load dropped to 0. Shortly after right alt light illuminated and the right load dropped to 0. The low volts annunciation illuminated. We elected to return to ZZZ in VMC conditions. We ran the QRH dual alternator checklist and determined to return to the airport with no alternators. We executed a VFR pattern and landing into ZZZ.

Original NASA ASRS Text

Title: C402 flight crew reported alternator failure and returned to departure airport.

Narrative: Left Alt light illuminated nearing top of climb; load share was normal. After 5 mins left load dropped to 0. Shortly after Right Alt light illuminated and the right load dropped to 0. The Low Volts annunciation illuminated. We elected to return to ZZZ in VMC conditions. We ran the QRH Dual Alternator checklist and determined to return to the airport with no alternators. We executed a VFR pattern and landing into ZZZ.

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.