Cessna 208 Caravan, Winnipeg, Canada, Oct. 6, 2005–The Canadian Transportation Safety Board (TSB) found that, although the Morningstar Air Express Caravan took off clean, its performance diminished as ice built on its critical surfaces. Moderate icing was forecast for the area. The Caravan was also about 3 percent overweight and 488 pounds over the 8,550-pound mtow for operating in icing conditions.
The pilot flying a Cessna Caravan that crashed after takeoff on Oct. 6, 2005, in Winnipeg, Manitoba, violated operational requirements, according to the Canadian Transportation Safety Board’s final report. Among the violations were taking off at a weight greater than the legal maximum takeoff weight and exceeding the time allowed between wing contamination inspection and takeoff.
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.
Canada’s Transportation Safety Board has made recommendations in line with the growing concern from the FAA and NTSB about the safety of Cessna 208 Caravans in icing conditions.
Further icing accidents and incidents involving the Cessna Caravan, flight manual revisions that contain erroneous data and recent flight tests prompted the FAA last week to issue AD 2006-06-06. The new directive supercedes AD 2005-07-01 issued last March.
A recent letter from the FAA’s Eastern Region regional counsel has generated concern that the agency has abruptly changed its icing policy. Regional counsel Loretta Alkalay’s letter was in response to a request by flight instructor Robert Miller for a definition of known ice. Alkalay wrote, “Known icing conditions exist when visible moisture or high relative humidity combines with temperatures near or below freezing.
Canada’s Transportation Safety Board (TSB) released the final report on the fatal icing-related crash of a Cessna 208 Caravan on Oct. 6, 2005 in Winnipeg, Canada. The Caravan was about 3 percent overweight and 200 pounds over mtow for operating in icing conditions. Moderate icing conditions were forecast in the Winnipeg area.
Part 25 aircraft likely to get more stringent icing rules