C402 pilot reported a dual alternator failure during climb resulting in a diversion to an alternate ...

Attributes
ACN	1650704
Time
Date	201905
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	Part 135
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	AC Generator/Alternator
Person 1
Function	Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Weather / Turbulence

Narrative:

Left altitude out light came on intermittently. After about 5 minutes both left and right altitude out lights came on along with low volt light. [Requested priority handling] and diverted to ZZZ. Landing normal. Taxied to the gate.

Original NASA ASRS Text

Title: C402 pilot reported a dual alternator failure during climb resulting in a diversion to an alternate airport.

Narrative: Left ALT OUT light came on intermittently. After about 5 minutes both L and R ALT OUT lights came on along with LOW VOLT light. [Requested priority handling] and diverted to ZZZ. Landing normal. Taxied to the gate.

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.