WASHINGTON, D.C. — The U.S. Department of Transportation’s Federal Aviation Administration (FAA) today changed its certification standards for transport category airplanes to require either the automatic activation of ice protection systems or a method to tell pilots when they should be activated.
The new rule requires an effective way to ensure the ice protection system is activated at the proper time. The rule applies to new transport aircraft designs and significant changes to current designs that affect the safety of flight in icing conditions. There is no requirement to modify existing airplane designs, but the FAA is considering a similar rulemaking that would cover those designs.
“We’re adding another level of safety to prevent situations where pilots are either completely unaware of ice accumulation or don’t think it’s significant enough to warrant turning on their ice protection equipment,” said FAA Administrator Randy Babbitt.
Under the revised certification standards, new transport aircraft designs must have one of three methods to detect icing and to activate the airframe ice protection system:
• An ice detection system that automatically activates or alerts pilots to turn on the ice protection system;
• A definition of visual signs of ice buildup on a specified surface (e.g., wings) combined with an advisory system that alerts the pilots to activate the ice protection system; or
• Identification of temperature and moisture conditions conducive to airframe icing that would tip off pilots to activate the ice protection system.
The standards further require that after initial activation, the ice protection system must operate continuously, automatically turn on and off, or alert the pilots when the system should be cycled.
The full text of the final rule is available at: edocket.access.gpo.gov/2009/E9-18483.htm.
Inadequate Airspeed, Failure to Activate Deice Boots Among Causes Cited by NTSB in Pueblo, Colorado Corporate Jet Crash
NTSB determined February 2005 crash of Cessna Citation owned by Circuit City Stores, Inc., caused by flight crew's failure to effectively monitor and maintain airspeed and comply with procedures for...
The rule applies only to in-service aircraft that weigh less than 60,000 pounds because studies show smaller planes are more affected by undetected icing or late activation of the ice protection...
Safety Alert states that leading-edge deice boots should be activated as soon as icing is encountered, unless ...
De-ice Technology Develops New systems you can bet your boots on By Greg Napert October 1998 There are three basic types of ice prevention systems that have been in common use over...