Incident at 45 miles S CALGARY INTL AB (CYYC)


2016-06-03: UPDATE: TSB#A16W0052: C-GTJL, a Sunwest Aviation Ltd Learjet 35A, was operating as flight CNK633 from Calgary Intl, AB (CYYC) to Houston/William P Hobby, TX (KHOU). While in the climb through 11 000 feet, the flight crew noticed that the aircraft was left of track and attempted to correct. Crossing 14 000 feet, the aircraft was still deviating left of track so the PIC disconnected the autopilot to correct manually. At this point, the PIC felt significant resistance in the aileron controls. After the crew confirmed that the resistance was felt on both control columns, an emergency was declared. The crew requested shallow vectors only back to CYYC. The fuel in the wing tip tanks was jettisoned and the crew disengaged the yaw damper to aid in roll control. While on an extended downwind leg for Runway 17L, the PIC noticed increased roll control followed by an abrupt freeing of the controls. The crew confirmed that the controls were operating normally but continued with the emergency check list and flew the approach with the autopilot off. The aircraft safely landed at CYYC with ARFF in attendance. Subsequent inspection by the operator?s maintenance found no faults or damage to the aircraft control system and autopilot.
2016-05-25: A Sunwest Aviation Learjet 35 (CNK633) from Calgary, AB (CYYC) to Houston, TX (KIAH) reported flight control issues and elected to return to CYYC. The aircraft was required to dump fuel for approximately 1 minute prior to joining downwind for Runway 17L. The aircraft landed safely at 1442Z. Aircraft Rescue and Fire Fighting (ARFF) was on standby. No impact on operations.


CADORS Number 2016C1674
Occurrence Type Incident
Reported By NAV CANADA, Transportation Safety Board of Canada
Occurred At 2016-05-12 - 14:23
Day or Night? Day-time
Fatalities 0
Injuries 0
Aerodrome ID
Aerodrome Name
Geographic Location Alberta, Canada, North America, Prairie and Northern Region, 45 miles S CALGARY INTL AB (CYYC)
TSB Occurrence Number A16W0052
TSB Class of Investigation Class 5
AOR Number 200409-V1
Reported By NAV CANADA, Transportation Safety Board of Canada
Categories System/component failure or malfunction [non-powerplant],Other,Fuel related

Aircraft Details (1 aircraft)

Type Aeroplane
 Silhouette image of Aeroplane
Canadian Registration GTJL | Flightaware (Registration) | Flightaware (Tracking) | AvHerald
Foreign Registration
Country of Registration Canada
Occurrence Type Incident
Owner Sunwest Aviation Ltd.
Operator SUNWEST AVIATION LTD. (5404) Commercial
Make  Silhouette image of LEARJET
Model 35A
Year Built 1977
Engine Type Turbo fan
Engine Make  Silhouette image of GARRETT
Engine Model TFE731-2-2B
Gear Type Land
Private No
Amateur Built No
Flight Number CNK633
Flight Rule IFR
CARS Subpart 704
Phase of Flight Climb
Damage No Damage
Fatalities 0
Injuries 0
Events Declared emergency/priority,Flight control systems (ailerons, rudder, rotors, flaps, main, tail),Diversion,Fuel - dumping

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