Incident at ST. JOHN'S INTL NL (CYYT)


2015-10-21: A Porter Airlines de Havilland DHC 8 402 (C-GLQO/ POE231) from Halifax, NS (CYHZ) to St. John's, NL (CYYT) descended beyond his cleared altitude on approach to CYYT conflicting with a Cougar Helicopters Sikorsky S-92A (C-GKKN/ CHI21) from St. John's, NL (CYYT) enroute to Terra Nova, NL (CTNV).
2015-10-21: UPDATE: TSB Report#A13A0125: A Porter Dash 8-400, C-GLQO, was operating as flight POE231 from Halifax (CYHZ) to St. John's (CYYT). POE231 was being vectored for arrival onto runway 29 and cleared to 4000 feet. A Cougar S-92A helicopter, C-GKKN, operated as CHI21, was outbound from CYYT to the Terra Nova drilling platform at 3000 feet. The controller passed the traffic information to POE231 and was advised to expect lower once they have passed the CHI21. POE231 reported CHI21 traffic in sight. The controller advised POE231 that traffic was level at 3000 feet and then instructed POE231 to turn for runway 29. POE231 commenced descent below 4000 feet, having taken the traffic information at 3000 feet as a descent clearance. The controller asked POE231 to confirm they were still at 4000 feet. POE231 said they were descending to 3000 feet, although they had not been cleared to descend below 4000 feet. POE231 flew directly over CHI21 at approximately 3600 feet.


CADORS Number 2013A1192
Occurrence Type Incident
Reported By NAV CANADA
Occurred At 2013-12-07 - 16:35
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID CYYT
Aerodrome Name ST. JOHN'S INTL NL (CYYT)
Geographic Location Newfoundland and Labrador, Canada, North America, Atlantic Region, ST. JOHN'S INTL NL (CYYT)
TSB Occurrence Number A13A0125
TSB Class of Investigation Class 5
AOR Number 169331-V1
Reported By NAV CANADA
Categories Navigation Errors,Airprox/TCAS alert/loss of separation/(near) midair collisions

Aircraft Details (2 aircraft)

Type Helicopter
 Silhouette image of Helicopter
 Silhouette image of Aeroplane
Canadian Registration GKKN | Flightaware (Registration) | Flightaware (Tracking) | AvHerald GLQO | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada Canada
Occurrence Type Incident Incident
Owner Cougar Helicopters Inc. Porter Airlines Inc.
Operator COUGAR HELICOPTERS INC. (4791) Commercial PORTER AIRLINES INC. (15266) Commercial
Make  Silhouette image of SIKORSKY
 Silhouette image of DEHAVILLAND
Model S-92A DHC-8-402
Year Built 2010 2009
Engine Type Turbo shaft Turbo prop
Engine Model CT7-8A  Silhouette image of PW150A
Gear Type Land Land
Private No No
Amateur Built No No
Flight Number CHI21 POE231
Flight Rule IFR IFR
CARS Subpart 705
Phase of Flight Takeoff Descent
Damage No Damage No Damage
Fatalities 0 0
Injuries 0 0
Events Conflict - potential Navigation error,Conflict - potential

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