Incident at 90 SW of Winnipeg, MB


1997-10-29: NWA 1735 was enroute from Fargo, ND to Bismarck, ND and had to be diverted into Canadian airspace due to severe weather. At FL 350 and about 90 miles southwest of Winnipeg, the a/c lost pressurization. The crew began an emergency descent to 10,000 feet and squawked 7700. The Captain elected to take the flight to Minneapolis, and Minneaplois ACC later advised that the a/c landed without further incident. UPDATE The flight was enroute from Minneapolis to Bismarck, ND and diverted to the north, almost to Dauphin, to avoid a line of thunderstorms. The crew then headed back to the southwest toward Brandon and received a cabin pressure warning light. They requested descent clearance from Winnipeg Centre, however, they were unable to make contact with the ACC. They elected to broadcast a Mayday on 121.5 and squawked 7700 in order to clear their airspace. The crew were eventually able to make contact with an Approach Controller in Grand Forks, ND who co-ordinated a descent clearance for them. The a/c descended to 10,000 feet and diverted to Grand Forks airport where it landed without further incident. Maintenance replaced the cabin pressure controller, the cabin pressure amplifier, and the pre-pressure controller.


CADORS Number 1997C0711
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 1997-10-12 - 04:39
Day or Night?
Fatalities 0
Aerodrome ID
Aerodrome Name
Geographic Location Manitoba, Canada, North America, Prairie and Northern Region, 90 SW of Winnipeg, MB
TSB Occurrence Number
TSB Class of Investigation
AOR Number
Reported By NAV CANADA
Categories System/component failure or malfunction [non-powerplant],Other

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Operator Commercial
Make  Silhouette image of DOUGLAS
Model DC9 32
Year Built
Engine Type Turbo fan
Engine Make
Engine Model
Gear Type Land
Private No
Amateur Built No
Flight Number NWA 1735
Flight Rule
CARS Subpart
Phase of Flight Cruise
Damage Unknown
Fatalities 0
Injuries 0
Events Declared emergency/priority,Decompression/pressurization

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