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The POH also warns that the stall-warning horn may not function if one inch of ice has accumulated, and there may be little or no prestall buffet. That an accumulation of one inch of ice on the leading edge can cause up to 500 fpm loss in rate of climb, a cruise-speed reduction of up to 40 kias and a significant buffet and stall speed increase of up to 20 knots. The recommendation further stated that the Pilot’s Operating Handbook warns The Caravan’s high wing “makes it difficult,” the recommendation said, for a pilot to see ice on the upper wing surface aft of the de-ice boots. Although the accident is still under investigation, witnesses have since reported that the ATP-rated pilot, who was killed, made a tactile examination of the wings for ice and frost during preflight.Īfter its 2003 study, the NTSB issued a recommendation (A-04-64 through -67) to the FAA in December 2004. The airplane crashed three minutes later.
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The autopilot disengaged and the airplane descended with bank-angle excursions of plus or minus 40 degrees and reached 226 knots just before it hit the ground.Īuthorities are also concerned about the Morning Star Air Express Caravan crash in Winnipeg last October, in which the pilot told ATC two minutes after takeoff that she needed to return to the airport because of icing. At about 102 knots, the Caravan began to stall. Initial investigation by the Interstate Aviation Commission of Russia, with assistance from the NTSB, showed that the pilots, cruising at 9,840 feet on autopilot, were discussing severe icing only five minutes after they had reported to ATC they were not experiencing icing, which was forecast.Ĭleared to descend for landing, the crew was reading the descent checklist about the time the FDR indicated the airplane pitched up as the airspeed began to decrease. The aircraft was equipped with a flight data recorder (FDR) and a cockpit voice recorder. The two pilots and six passengers were killed and the airplane destroyed. On November 19 last year an Aruban-registered Caravan 208B, P4-OIN, crashed on approach to Moscow Domodedovo International Airport after the crew reported they had encountered icing conditions. Two recent accidents have added to the authorities’ concern. (There are no details on the 26th.) The NTSB said that most were in “flight in icing conditions that appeared to be within the parameters of the FAA’s icing-certification envelope.” Last April, the FAA recorded six accidents during the 20 icing season. In 10, ice accumulated on the ground, before takeoff, and was not removed adequately.
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In 15 cases, ice accumulated while the airplane was in flight, during approach and landing. In 2003 the NTSB studied 26 icing-related accidents and incidents resulting in 36 fatalities between 19. (FedEx and its contractors own and operate 264 Caravans UPS contractors operate 44.) These missions do not lend themselves to no-go decisions and are frequently flown by young, inexperienced pilots. The Caravan is considered a workhorse, used for overnight cargo hauling for carriers such as FedEx and United Parcel Service, as well as for medical and check-hauling operations by smaller entities. Caravans continue to be plagued by icing accidents–more than 34 to date– and the number of lawsuits against the manufacturer is mounting. and Canada have issued a bevy of new recommendations, airworthiness directives and restrictions. Concerned about the growing number of Cessna 208 Caravan icing accidents, aviation authorities in the U.S.