Incident at CYMON Intersection


2010-06-10: UPDATE TSB: A10A0055: N780UA, a United Airlines Boeing 777-200, was en route from Chicago to Munich when the flight crew noted that the EICAS "LOW CREW OXYGEN" message had illuminated. The pilots queried the status page and observed crew oxygen pressure read zero. The crew declared an emergency and requested and received a clearance to divert to Gander. Shortly thereafter the crew noted that the EICAS message had extinguished and the crew oxygen pressure was indicating normal. They requested and received a clearance to continue to the original destination and the aircraft exited Canadian airspace without further incident.
2010-05-25: UAL906, Boeing 777-200, enroute from Chicago (KORD) to Munich (EDDM), at CYMON Intersection at 02:36Z, at 36,000 ft, declared an emergency due to a lack of oxygen in the cockpit. The aircraft turned towards Gander (CYQX) and descended to 10,000 ft. The oxygen problem was corrected at 02:57Z and the flight crew decided to proceed to the original destination. TSB Case Closed.


CADORS Number 2010A0443
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2010-05-24 - 02:36
Day or Night?
Fatalities 0
Injuries 0
Aerodrome ID
Aerodrome Name
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region, CYMON Intersection
TSB Occurrence Number A10A0055
TSB Class of Investigation Class 5
AOR Number 119264-V1
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
Operator UNITED AIR LINES, INC. (422) Commercial
Make  Silhouette image of BOEING
Model 777 200 SERIES
Year Built
Engine Type Turbo fan
Engine Make
Engine Model
Gear Type Land
Private No
Amateur Built No
Flight Number UAL906
Flight Rule
CARS Subpart
Phase of Flight Cruise
Damage No Damage
Fatalities 0
Injuries 0
Events Decompression/pressurization,Diversion,Declared emergency/priority

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