What is Runback ice?
Runback ice Ice that forms aft of treated surfaces when anti-icing fluids are overwhelmed by supercooled water running back and freezing further aft on aircraft surfaces.
Source: ICAO Doc 9432, FAA PCG
How is “Runback ice” Used in Practice?
After de-icing, check for runback ice on wing surfaces, especially near the trailing edge before departure.
Certification Exam Relevance
Who Needs to Know This Term?
- Pilots
- Air Traffic Controllers
- Cabin Crew
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What is Runback ice?
Ice that forms aft of treated surfaces when anti-icing fluids are overwhelmed by supercooled water running back and freezing further aft on aircraft surfaces.
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