737NG wing anti-ice

[fivegreenlight]

With engine and wing anti-ice selected on, why does the master caution briefly illuminate as the thrust levers advance for take off? ( I know the valves close as the levers advance and the wing AI switches trip off as the aircraft gets airborne.) Seen this a few times on different NG's and can't find a reason.

[mrjet]

Momentary illumination of the cowl-anti ice light (overpressure in the engine anti-ice duct)

[slip and turn]

...Seen this a few times on different NG's Has it ever caused you to abort ? :E

[fivegreenlight]

MrJet, I guess you're right, why does't it ever happen on the 300/500?

S&T, in short..no.