2003-05-01: UPS 6830, a B767-34AF, was enroute at FL 380 from Chicago to Anchorage and in the vicinity of Grande Prairie when the crew reported a loss of pressurisation. They requested lower and descended to 10,000 feet and advised Edmonton ACC that they were diverting to Calgary. Maintenance and Manufacturing in Calgary reported that the aircraft had flown through heavy rain while ascending to altitude. CANCOM, a Calgary based AMO, found one outflow valve iced. The ice was removed and the aircraft was returned to service.
2003-05-02: UPDATE TSB reported that the United Parcel Service (UPS) Boeing 767-300 freighter, registration N328UP, was operating as flight UPS 6830 from Chicago, Illinois to Anchorage, Alaska. In the vicinity of Grand Prairie, Alberta, at FL 360, the flight crew received a ""CABIN AUTO INOP"" EICAS message. Control of the pressurization system was switched to manual and after a few minutes, cabin pressure was lost. The flight crew requested and was cleared to 10,000 feet with a diversion to Calgary, Alberta. Manual control of the pressurization system was regained at 9,000 feet.


CADORS Number 2003C0527
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2003-05-01 - 12:10
Day or Night?
Fatalities 0
Aerodrome ID CYQU
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, Vicinity of Grande Prairie
TSB Occurrence Number A03W0082
TSB Class of Investigation Class 5
AOR Number 28938
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 the United States of America
Occurrence Type Incident
Owner CC & EI LLC
Operator UNITED PARCEL SERVICE CO. (5826) Commercial
Make  Silhouette image of BOEING
Model 767 333
Year Built 1998
Engine Type Turbo fan
Engine Make
Engine Model
Gear Type Land
Private No
Amateur Built No
Flight Number UPS 6830
Flight Rule
CARS Subpart
Phase of Flight Cruise
Damage No Damage
Fatalities 0
Injuries 0
Events Diversion,Decompression/pressurization

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