Incident at Approximately 46N


2015-07-13: At 0119Z, a British Airways Boeing 747 400 (GCIVD/ BAW45B) from Boston, MA (KBOS) to London, UK (EGLL) advised that they were unable to maintain M.80 and were increasing to M.82 due to turbulence and aircraft performance. Air Traffic Control (ATC) was unable to approve due to slower traffic ahead who was also in turbulence and could not speed up. There was no actual loss of separation. Separation was projected to be lost around 35W due to a much fast aircraft behind. After progressing 40W, ATC was able to provide 5 minutes long separation to landfall and then approved the aircraft to increase in speed.


CADORS Number 2015A0535
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2015-06-26 - 01:19
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID
Aerodrome Name
Geographic Location Gander Oceanic, Atlantic Region, Approximately 46N
TSB Occurrence Number
TSB Class of Investigation
AOR Number 188769-V1
Reported By NAV CANADA
Categories Turbulence encounter

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration
Foreign Registration
Country of Registration the United Kingdom of Great Britain and Northern Ireland
Occurrence Type Incident
Operator BRITISH AIRWAYS (5430) Commercial
Make  Silhouette image of BOEING
Model 747 400
Year Built
Engine Type Turbo fan
Engine Make
Engine Model
Gear Type Land
Private No
Amateur Built No
Flight Number BAW45B
Flight Rule IFR
CARS Subpart 701
Phase of Flight Cruise
Damage No Damage
Fatalities 0
Injuries 0
Events Weather - clear air turbulence (CAT)/turbulence

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