The NTSB determined today that the Feb. 16, 2005 crash of a Circuit City Cessna Citation 560 during the approach to Pueblo Memorial Airport, Colo., was caused because during the approach, as they flew through a cloud containing supercooled liquid droplets, the flight crew didn’t activate the deicing boots at the first sign of ice buildup (as specified in the AFM) and possibly not at all, and didn’t monitor airspeed, which led to a stall.
In its determination of the probable cause of the PenAir Caravan crash, the Safety Board also said that a factor contributing to the accident “was the lack of a preflight inspection requirement to examine at close range the upper surface of the wing for ice contamination when ground icing conditions exist.” Such a requirement is now on the books, the result of an AD issued in March following an FAA investigation into incidents involving Carava
Deicing boots must be installed on the landing gear struts and cargo pods of several hundred Cessna Caravans approved for flight into icing under an AD published today.
A proposed AD would require the installation of de-icing boots on the landing-gear struts and cargo pods, as well as other changes to deicing equipment and procedures, on nearly 750 U.S.-registered Cessna 208 Caravans. The directive stems from the FAA’s investigation into nine icing-related incidents within the past few months and six accidents in the previous two icing seasons.
Eleven years after the October 1994 crash of American Eagle Flight 4184 in Roselawn, Ind., the FAA proposed a revision to Part 25 certification regulations that aims to prevent such icing accidents. The comment period for the notice of proposed rulemaking (NPRM) closed on February 2. Now the new rules will begin to wend their way through the FAA rulemaking process.
Concerned about the growing number of Cessna 208 Caravan icing accidents, aviation authorities in the U.S. and Canada have issued a bevy of new recommendations, airworthiness directives and restrictions. Caravans continue to be plagued by icing accidents–more than 34 to date– and the number of lawsuits against the manufacturer is mounting.
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