Incident at 5233N04521W


2015-06-17: A Turkish Airlines Boeing 777 300 (TCJJI/ THY18A) from Toronto, ON (CYYZ) to Istanbul, Turkey (LTBA) requested FL350. At 0537Z, a climb clearance to FL340 was sent to and acknowledged by flight. At 0539Z, a message via controller-pilot data link communications (CPDLC) was presented to the controller that flight was at FL345. Flight was requested to confirm flight level and 30 seconds later confirmed FL340. The pilot confirmed they had entered FL350 in flight management system (FMS) by error and reached FL348 before realizing their mistake. Flight descended to FL340. Traffic nine miles longitudinal and 200 feet vertical.


CADORS Number 2015A0436
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2015-05-24 - 05:40
Day or Night? Night-time
Fatalities 0
Injuries 0
Aerodrome ID
Aerodrome Name
Geographic Location Gander Oceanic, Atlantic Region, 5233N04521W
TSB Occurrence Number
TSB Class of Investigation
AOR Number 187811-V1
Reported By NAV CANADA
Categories Navigation Errors

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration
Foreign Registration
Country of Registration Republic of Turkey
Occurrence Type Incident
Operator (TURKISH AIRLINES INC.) (15405) Commercial
Make  Silhouette image of BOEING
Model 777 300 SERIES
Year Built
Engine Type Turbo fan
Engine Make
Engine Model
Gear Type Land
Private No
Amateur Built No
Flight Number THY18A
Flight Rule IFR
CARS Subpart 701
Phase of Flight Cruise
Damage No Damage
Fatalities 0
Injuries 0
Events Navigation error

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