Narrative:On the day before the occurrence, the accident aircraft arrived in Winnipeg (YWG), on a flight from Thunder Bay. The aircraft was parked in a heated hangar overnight and was pulled outside at about 04:10 local time. The pilot reviewed the weather information and completed planning for the flight, which was estimated to take two hours and
six minutes. The aircraft was refuelled and taxied to Apron V, where it was loaded with cargo. After loading was complete, the pilot obtained an instrument flight rules (IFR) clearance for flight 8060 to Thunder Bay, taxied to runway 36, received takeoff clearance, and departed.
The aircraft climbed on runway heading for about one minute to an altitude of 1300 feet above sea level (asl), 500 feet above ground level (agl). The flight was cleared to 9000 feet asl direct to Thunder Bay, and the pilot turned on course. The aircraft continued to climb, reaching a maximum altitude of 2400 feet asl about 2.5 minutes after takeoff. At 05:41 the pilot reported: "... eight zero six zero need an immediate back to the field". The controller replied: "Sixty, say again," after which the pilot reported: "Need an immediate back to the field.. Im iced-up to the point where I need to come back." The controller then gave instructions to return to Winnipeg: "Morningstar eighty sixty turn right turn heading 250 and if you are able maintain 2500". The pilot replied that she would not be able to maintain that altitude. The controller then instructed the pilot to turn right to heading 280 for runway 31. The runway lights were turned up to the brightest and the controller reported that she would have the airport at her two o'clock position at about three miles. The Cessna did not make it and crashed on the Canadian National main railway track about 200 yards east of the intersection of Osborne Street and Corydon Avenue and burst into flames.
Probable Cause:
FINDINGS AS TO CAUSES AND CONTRIBUTING FACTORS:
1. The aircraft departed at a weight exceeding the maximum take-off weight and the maximum weight for operation in icing conditions.
2. After departure from Winnipeg, the aircraft encountered in-flight icing conditions in which the aircraft's performance deteriorated until the aircraft was unable to maintain altitude.
3. During the attempt to return to the Winnipeg International Airport, the pilot lost control of the aircraft, likely with little or no warning, at an altitude from which recovery was not possible.
Accident investigation:
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Investigating agency: | TSB Canada |
Status: | Investigation completed |
Duration: | 1 year and 2 months | Accident number: | TSB Report A05C0187 | Download report: | Final report
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Classification:
Icing
Loss of control
Sources:
» TSB Report A05C0187
METAR Weather report:
10:31 UTC / 05:31 local time:
CYWG 061031Z 36015G20KT 4SM -SN BR BKN010 OVC053 RMK SC6SC2=11:00 UTC / 06:00 local time:
CYWG 061100Z 36015KT 6SM -SN BR SCT007 BKN017 OVC055 M01/M01A3026 RMK SF4SC2SC2 SLP260=
Follow-up / safety actions
NTSB issued 3 Safety Recommendations
TSB issued 4 Safety Recommendations
Issued: 17-JAN-2006 | To: FAA | A-06-1 |
Require all operators of Cessna 208 series airplanes to maintain a minimum operating airspeed of 120 knots during flight in icing conditions, even if a descent is required to do so. (Urgent) (Closed - Acceptable Action) |
Issued: 17-JAN-2006 | To: FAA | A-06-2 |
Prohibit all operators of Cessna 208 series airplanes from conducting flight into any icing conditions determined to be more than light icing. (Urgent) (Closed - Acceptable Action) |
Issued: 17-JAN-2006 | To: FAA | A-06-3 |
Require all operators of Cessna 208 series airplanes to disengage the autopilot and fly the airplane manually when operating in icing conditions. (Urgent) (Closed - Acceptable Action) |
Issued: 06-DEC-2006 | To: DoT Canada | A06-01 |
The Department of Transport take action to restrict the dispatch of Canadian Cessna 208, 208A, and 208B aircraft into forecast icing meteorological conditions exceeding "light," and prohibit the continued operation in these conditions, until the airworthiness of the aircraft to operate in such conditions is demonstrated. (Fully satisfactory) |
Issued: 06-DEC-2006 | To: DoT Canada | A06-02 |
The Department of Transport require that Canadian Cessna 208 operators maintain a minimum operating airspeed of 120 knots during icing conditions and exit icing conditions as soon as performance degradations prevent the aircraft from maintaining 120 knots. (Fully satisfactory) |
Issued: 06-DEC-2006 | To: FAA | A06-03 |
The Federal Aviation Administration take action to revise the certification of Cessna 208, 208A, and 208B aircraft to prohibit flight into forecast or in actual icing meteorological conditions exceeding "light," until the airworthiness of the aircraft to operate in such conditions is demonstrated. (Fully satisfactory) |
Issued: 06-DEC-2006 | To: FAA | A06-04 |
The Federal Aviation Administration require that Cessna 208 operators maintain a minimum operating airspeed of 120 knots during icing conditions and exit icing conditions as soon as performance degradations prevent the aircraft from maintaining 120 knots. (Fully satisfactory) |
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Photos
accident date:
06-10-2005type: Cessna 208B Super Cargomaster
registration: C-FEXS
accident date:
06-10-2005type: Cessna 208B Super Cargomaster
registration: C-FEXS
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does
not display the exact flight path.
Distance from Winnipeg International Airport, MB to Thunder Bay Airport, ON as the crow flies is 596 km (372 miles).
Accident location: Approximate; accuracy within a few kilometers.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.