B787 flight crew reported experiencing a lighting strike on departure.

Attributes
ACN	1651364
Time
Date	201905
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	B787 Dreamliner Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Route In Use	SID ZZZZZ
Flight Plan	IFR
Component
Aircraft Component	Cockpit Window
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 181 Flight Crew Total 8920 Flight Crew Type 1561
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 164 Flight Crew Total 17575 Flight Crew Type 1274
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Weather / Turbulence

Narrative:

We operated flight XXX FM ZZZ to ZZZZ. I was international relief officer during this flight. We taxied out and departed with no abnormality. Flight conditions at time of departure was IMC with heavy precipitation in some quadrants. Sometime after 4;000 ft; there was a flash of light and a loud noise outside; similar to that of lightning. Captain was flying and first officer was non-flying pilot at this point. Immediately following we received two messages on ecias '(l) primary fwd window heat inop and primary (r) side window inop'. We continued to climb and the first officer completed the checklist for the window heat l/r at which time I was delegated the task to contact dispatch and maintenance control. I also contact the lead flight attendant to make sure the crew and passengers were ok and no further incident in the man cabin was reported. They remained seated. Once on the phone with maintenance control I noted to him the message we received on the ecias and he stated that he was aware and could see all the items that were listed. He was aware that this flight was international; operating to ZZZZ and ETOPS. The captain at that time noted that he was going to continue the conversation with maintenance. Maintenance control and the captain agreed to continue the flight to ZZZZ following company procedures. No further messages at that time occurred. We landed in ZZZZ and completed the parking; terminating checklists and debrief at the gate.

Original NASA ASRS Text

Title: B787 flight crew reported experiencing a lighting strike on departure.

Narrative: We operated flight XXX FM ZZZ to ZZZZ. I was IRO during this flight. We Taxied out and departed with no abnormality. Flight conditions at time of departure was IMC with heavy precipitation in some quadrants. sometime after 4;000 ft; there was a flash of light and a loud noise outside; similar to that of lightning. Captain was flying and FO was non-flying pilot at this point. Immediately following we received two messages on ECIAS '(l) Primary fwd window heat inop and primary (r) side window inop'. We continued to climb and the FO completed the checklist for the window heat l/r at which time I was delegated the task to contact Dispatch and Maintenance Control. I also contact the lead flight attendant to make sure the crew and passengers were ok and no further incident in the man cabin was reported. They remained seated. Once on the phone with maintenance control I noted to him the message we received on the ECIAS and he stated that he was aware and could see all the items that were listed. He was aware that this flight was international; operating to ZZZZ and ETOPS. The Captain at that time noted that he was going to continue the conversation with Maintenance. Maintenance Control and the Captain agreed to continue the flight to ZZZZ following company procedures. No further messages at that time occurred. We landed in ZZZZ and completed the parking; terminating checklists and debrief at 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.