The line is detonation cording. It is there to shatter the canopy as part of the ejection sequence. It can be seen on many older combat jets. It is a less common system now as many aircraft use explosive bolts to jettison the entire canopy structure instead.
In the case of a helicopter this is safer however. Because a helicopter is more likely to have little or no forward motion a canopy that has been jettisoned would be an impact hazard for ejecting crew.
The line is detonation cording. It is there to shatter the canopy as part of the ejection sequence. It can be seen on many older combat jets. It is a less common system now as many aircraft use explosive bolts to jettison the entire canopy structure instead.
In the case of a helicopter this is safer however. Because a helicopter is more likely to have little or no forward motion a canopy that has been jettisoned would be an impact hazard for ejecting crew.
F in chat for Goose. o7