wrote on Sep 27^th, 2012 at 12:44am:

Don-P1126 wrote on Sep 26th, 2012 at 7:49pm: On the nose radome those lines are lightning strips as far as the lines   I am pretty sure those are radar return/reciever strips for the WX radar, well correct me if I am wrong...

Hi AirCanadaGuy,

No offense, but I think Don is right.

As far as I know, the radar domes are almost entirely made ​​of fiberglass, an electrical insulating material, so, most fiberglass radar domes have metal diverter strips to form a path for the electrical current to flow to the metal frame of the radar dome and then to the fuselage in case of a lightening strike to the radar dome.

Pinatubo.