TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 OBS

runback: The condition in which water runs back from the leading edge to freeze in a colder zone, caused either by the liberation of latent heat from supercooled droplets to an extent that the droplets remain liquid and run back, or by insufficient heat being supplied to the leading edge to evaporate all the water there so that some of it runs back. [French equivalent: "ruissellement."]  2, record 1, English, - runback%20ice

Record number: 1, Textual support number: 1 CONT

The signal change also created a potential concern. Although the revision reduced the size of all leading edge accumulation ice shapes, the issue of potential runback ice was raised since the system is activated with only a thin level of ice buildup.  3, record 1, English, - runback%20ice

Record number: 1, Textual support number: 2 CONT

Freezing rain, freezing drizzle and mixed conditions may result in extreme ice build-up on protected surfaces exceeding the capability of the ice protection system. Freezing rain, freezing drizzle, mixed conditions and descent into icing clouds from above freezing temperatures may result in runback ice forming beyond protected surfaces. This ice cannot be shed and it may seriously degrade performance and control of the airplane.  4, record 1, English, - runback%20ice

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

Glace formée en vol sur l'aile de l'avion lorsque les dispositifs conçus pour faire fondre la glace sur le bord d'attaque ne suffisent pas à causer l'évaporation de l'eau fondue, qui «regèle» plus loin en aval sur l'aile.  2, record 1, French, - glace%20de%20ruissellement

Record 1,  Textual support,  Spanish