C402 flight crew reported encountering severe icing on climbout.

Attributes
ACN	1607807
Time
Date	201901
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	Part 135
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Commercial
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Commercial
Events
Anomaly	Flight Deck / Cabin / Aircraft Event Other / Unknown Inflight Event / Encounter Weather / Turbulence

Narrative:

On climbout from ZZZ we initially picked up trace mixed icing. As we climbed through about 5;000 feet we were picking up heavier ice. The ice was shedding off the aircraft and causing it to yaw back and forth as the ice would shed. At this point [we] decided it was time to go full power and continue climbing out of the ice and blow the boots. Most of the ice came off at that point. We got on top at around 7;000 feet where we were able to shed the majority of the ice. We continued and landed at [our destination] without incident. We made the decision not to return to ZZZ that evening due to the ice as going missed at ZZZ and climbing back into the ice would be poor.

Original NASA ASRS Text

Title: C402 flight crew reported encountering severe icing on climbout.

Narrative: On climbout from ZZZ we initially picked up trace mixed icing. As we climbed through about 5;000 feet we were picking up heavier ice. The ice was shedding off the aircraft and causing it to yaw back and forth as the ice would shed. At this point [we] decided it was time to go full power and continue climbing out of the ice and blow the boots. Most of the ice came off at that point. We got on top at around 7;000 feet where we were able to shed the majority of the ice. We continued and landed at [our destination] without incident. We made the decision not to return to ZZZ that evening due to the ice as going missed at ZZZ and climbing back into the ice would be poor.

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.