January 9, 2021

Incident at MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL)

An Aviation Starlink Inc. Bombardier BD-700-1A10 (C-GOAB) from Paris–Le Bourget, France (LFPB) to Montreal/Pierre Elliott Trudeau, QC (CYUL) initiated an overshoot while on final for Runway 24L. No impact on operations.

July 23, 2019

Incident at 4846N / 07648W

Trajectory deviation detected by the Automatic Dependent Surveillance – Contract (ADS-C) for a Bombardier BD-700-1A10, operated by Global Jet Luxembourg (LXZAK/SVW65ZK), flying from Paris/Le Bourget, France (LFPB) to Toronto/Pearson, ON (CYYZ). The aircraft was following DCT YVO DCT YXI BETUL IMEBA IMEBA5. The flight plan was: DCT YVO IMEBA IMEBA5. No impact on operations.

September 27, 2019

Incident at MONCTON CENTRE / ACC DE MONCTON

A Saudi Arabian Boeing 737-700 state aircraft (HZMF2/SVA7534) on a flight from New York/John F. Kennedy Intl, NY (KJFK) to Paris/Le Bourget, France (LFPB) lost all its navigation equipment in flight and turned around to KJFK when they were with Gander. The aircraft required vectors and did not declare an emergency. Boston advised and SVA dispatch advised. No impact on operations, Safety was not jeopardized.

Incident at JOOPY intersection

At 2325Z and abeam JOOPY, a Saudi Arabian Airlines Boeing 737-700 (HZMF2/SVA7534) on a flight from New York/John F. Kennedy Intl, NY (KJFK) to Paris/Le Bourget, France (LFPB) reported a navigation failure and requested to return to KJFK. Flight was re-cleared to KJFK and given a heading of 270. The aircraft exited the Gander flight information region (FIR) at 0000Z.

September 15, 2019

Incident at S HALIFAX / STANFIELD INTL NS (CYHZ)

Multiple aircraft, including a Netjets Transportes Aereos Bombardier BD-700-1A10 (CSGLD/NJE5NV) on a flight from Paris/Le Bourget (LFPB) to Washington/Dulles Intl, VA (KIAD) were filed through the active CYD areas south of Halifax/Stanfield Intl, NS (CYHZ). This impacted controller workload by necessitating multiple reroutes.

June 2, 2019

Incident at 5100N / 04000W

A Skyservice Business Aviation Inc. Gulfstream GV (C-GLFV) from Toronto/Pearson, ON (CYYZ) to Paris–Le Bourget, France (LFPB) reported routing that differed from its cleared route. Air Traffic Control (ATC) intervened prior to a deviation occurring. No traffic. No impact to operations.

January 9, 2019

Incident at 5050N / 05000W

An American, corporately registered Dassault Mystere Falcon 900 (N91CJ) from Paris/Le Bourget, France (LFPB) to Bangor International, ME (KBGR) was flight planned on a routing in part 51N040W 50N050W and reported via HF 51N040W/1108 estimating 50N050W/1155. The flight was observed on radar approximately 50NM north of course at 50W. When queried, the pilot reported a flight management system (FMS) issue. No traffic.

May 15, 2018

Incident at 4857N / 06444W

The pilot of an American co-owned Bombardier BD-700-1A10 (N142QS) from Paris/Le Bourget, France (LFPB) to Teterboro, NJ (KTEB) reported a failure of the #2 hydraulic system elected to divert to Bangor, ME (KBGR). No emergency declared, no assistance required. No impact on operations.

January 11, 2018

Incident at 4516N / 05638W

At 1824Z, an American corporately registered Mystere Falcon 900 (N404BC) on a flight from Teterboro, NJ (KTEB) to Paris/Le Bourget, France (LFPB) advised they were climbing from FL370 to FL400 without a clearance. There was no traffic, so the aircraft was then cleared to continue climb to FL400.

December 23, 2017

Incident at MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL)

A Gulfstream G-IV operated by Western Air Charter (N445BJ/EDG445), flying from Paris (LFPB), France, to Montréal/Pierre-Elliott-Trudeau (CYUL), QC, was instructed to go-around runway 06L. An Airbus A320-211 operated by Air Canada (C-FLSS/ACA411), flying from CYUL to Toronto/Lester B. Pearson (CYYZ), ON, had not finished its run-up and was still in position.

September 10, 2017

Incident at TORONTO / LESTER B. PEARSON INTL ON (CYYZ)

An Air Canada Boeing 767-300 (ACA184) on a flight from Vancouver, BC (CYVR) to Toronto/Lester B. Pearson, ON (CYYZ) was instructed to overshoot due to an American corporately registered Bombardier BD-700-1A11 (N880ZJ) on a flight from Paris, France (LFPB) to Toronto/Lester B. Pearson, ON (CYYZ) slow to vacate Runway 05. No operational impact.

November 10, 2017

Incident at 6443N / 06302W

A Swiss registered Dassault Falcon 2000EX, on a flight from Paris, France (LFPB) to Iqaluit, NU (CYFB) was observed 4NM north and diverging from its authorized route, which was AVPUT YFB. The aircraft was flying AVPUT USBIV without receiving authorization for a new route. Air traffic control (ATC) reauthorized the aircraft for AVPUT USBIV. No impact to operations.

July 1, 2017

Incident at 85NM HALIFAX / STANFIELD INTL NS (CYHZ)

An American corporately registered Bombardier CL-600-2B16 (N999VK) on a flight from Teterboro, NJ (KTEB) to Paris/Le Bourget, France (LFPB) indicated routing different than air traffic control (ATC) information in Canadian Automated Air Traffic System (CAATS). No impact.

June 6, 2017

Incident at 13NM SE SAINT JOHN NB (CYSJ)

UPDATE: TSB REPORT#A17A0039: N990NB, a private Gulfstream GV SP aircraft, was conducting a flight from Bedford, MA (KBED) to Paris, France (LFPB). Approximately 13 nm southeast of Saint John, NB the crew received a RETRIM RIGHT WING DOWN crew alerting system message (CAS) followed by a RETRIM LEFT WING DOWN CAS message. The autopilot system was disconnected, and intermittent binding of the aileron control system was noted by the crew. The crew declared an emergency, requested a diversion to Bangor, ME (KBGR) and landed at KBGR uneventfully. Maintenance determined the fault was the #1 Aileron Autopilot Servo and it was replaced.
An American corporately registered Gulfstream GV-SP (N990NB) on a flight from Bedford, MA (KBED) declared an emergency with a flight control problem while on autopilot. The aircraft requested a diversion to Bangor, ME (KBGR). No assistance required.

March 17, 2016

Incident at HOIST INTERSECTION

An American corporately registered Gulfstream Aerospace Gulfstream IV (N918CC) from Paris-Le Bourget, France (LFPB) to Chicago, IL (KMDW) that flight planned along North Atlantic Track (NAT) C had flight planned a North American Route, N604A, that is not authorized as per NOTAM Gander, NL (CZQX) 160054.

May 1, 2015

Incident at MONTRÉAL / PIERRE ELLIOTT TRUDEAU INTL QC (CYUL)

Even though an Execaire Bombardier CL-600-2B16 (Series 604) (C GHMW), from Montréal (CYUL), QC, to Paris/Le Bourget (LFPB), received and read back the instruction to conduct standard instrument departure (SID) TRUDO TWO DEP, the aircraft was seen turning left while the SID calls for a climb on the runway centerline. C GHMW immediately received corrective vectoring. No impact on operations.
Update: According to information from the Commercial and Business Aviation Division, the error was caused by incorrect programming of the flight management system (FMS) by the crew.

November 17, 2015

Incident at 44N046W

UPDATE: TSB#A15A0095: The Image Air Charter Ltd Dassault Falcon 900 (C-FWKX) aeroplane was enroute from Toronto/LBPIA, ON (CYYZ) to Paris/Le Bourget, France (LFPB). The flight was planned at FL410 but it was too heavy to climb to that altitude. The flight then had to descend to FL340 for their initial altitude crossing which caused a fuel burn excessively high to reach their planned destination with adequate reserve fuel. The crew elected to divert to St John's Intl, NL (CYYT) where they refueled and carried on with their flight.
At 0529Z and position 44N046W, an Image Air Charter Dassault Mystere Falcon 900 (C-FWKX) from Toronto, ON (CYYZ) to Paris/ Le Bourget, France (LFPB) requested to divert to St John's, NL (CYYT) due fuel. Flight was cleared direct CYYT. Landed 0633Z. No traffic.

June 11, 2015

Incident at 40 miles E GOOSE BAY NL (CYYR)

An American corporately registered Gulfstream G-1159A (N939KM) from Goose Bay, NL (CYYR) to Paris/ Le Bourget, France (LFPB) departed CYYR at 0558Z and at 0609Z reported a mechanical issue, advised unable oceanic crossing and requested to divert to Gander, NL (CYQX). The flight was recleared as requested but at 0642Z flight requested further clearance to Bangor, ME (KBGR). Flight was again recleared as requested. Exited the Gander Flight Information Region (FIR) at 0650Z. No emergency, no assistance requested. The pilot reported flaps stuck at 10 degrees.

April 19, 2014

Incident at 45 NW KUUJJUAQ QC (CYVP)

A Masterjet Dassault Falcon 7X (LMJ402), from Los Angeles, CA (KLAX) to Paris/Le Bourget (LFPB), descended from FL410 to FL390 without authorization. No impact on operations.

May 25, 2014

Incident at OTTAWA / MACDONALD-CARTIER INTL ON (CYOW)

After landing on runway 25, air traffic control (ATC) unit reported a Global Jet Luxembourg Bombardier BD-700-1A11 (LXPAK/ SVW524AK) Paris/ Le Bourget (LFPB) to Ottawa, ON (CYOW) that black smoke seemed to come from the right engine for about 2 seconds while the aircraft was on short final. The pilot states that the aircraft seemed to want to accelerate approximately the same time. No impact on operations.

May 11, 2014

Incident at Nice Cote D'azur, France (LFMN)

TSB #A14F0064: C-FLMK, a Skyservice Business Aviation Inc. Challenger 605 CL-600-2B16, was on an IFR flight from Paris/Le Bourget (LFPB), France to Cannes/Mandelieu (LFMD), France. On descent, one of the pilots became ill and the flight diverted to Nice/Côte d?Azur (LFMN). The aircraft landed without incident with the other pilot conducting the landing. The aircraft was not damaged.

May 6, 2014

Incident at IQALUIT NU (CYFB)

A London Air Services Limited Bombardier CL-600-2B16 (C-FKMC), from Iqaluit, NU (CYFB) to Paris/Le Bourget, France (LFPB), did not respect the Standard Instrument Departure (SID) YFB2. Out at 3,500 feet on runway 35, the pilot initiated a direct shift NALDI. No impact on operations.

December 2, 2014

Incident at GANDER INTL NL (CYQX)

At 1505Z, an Egypt registered Gulfstream G IV from Gander, NL (CYQX) to Paris/ Le Bourget (LFPB) was given taxi instructions for departure to taxi Echo hold short Runway 31, hold short was read back the second time the instruction was issued. At 1506Z, a PAL Airlines de Havilland DHC-6 (C-GNFZ/ PVL940) from Fogo, NL (CDY3) to Gander, NL (CYQX) reported on the approach and was cleared to land Runway 31. At 1508Z, the Gulfstream G IV advised he was in taxi Echo holding short of Runway 31. At 1511Z, the Gulfstream G IV was observed in the backtrack Runway 31, area control centre (ACC) was advised. PVL940 cancelled IFR and executed a 360 for spacing. The Gulfstream G IV departed Runway 31 at 1511Z. PVL940 landed Runway 31 at 1512Z.

May 16, 2014

Incident at 4645N06223W (ELT)

Four aircraft, an Air Canada Airbus A320 (ACA667) from St John's, NL (CYYT) to Toronto, ON (CYYZ), an American corporately registered Gulfstream IV (N721BS) from Paris/ Le Bourget (LFPB) to Bangor, ME (KBGR), a United States Air Force Gulfstream IV from Gander, NL (CYQX) to Joint Base Andrews, ME (KADW), and a Jazz Bombardier CL600 2B19 (JZA8863) from Gander, NL (CYQX) to Halifax, NS (CYHZ) reported, at various levels (FL330-430), an emergency locator transmitter (ELT) in the vicinity of 4645N06223W.

February 2, 2014

Incident at JEBBY

NY oceanic coordinated with Moncton, NB (CYQM) ACC for an American corporately registered Gulfstream G5 (N595E) from Miami/ Opa-Iocka, FL (KOPF) to Paris/ Le Bourget (LFPB) a flight M202 JEBBY LOMPI URTAK. The aircraft progressed JEBBY with CYQM ACC and reported direct URTAK. Follow-up with NY showed that the aircraft had been cleared via AIRINC on the following route M202 JEBBY LOMPI URTAK. No other traffic in the area and no impact on the operation.

June 29, 2013

Incident at In the vicinity of BOPUT intersection

A Skybird Aviation Gulfstream GV-SP (N234DB) from Paris/ Le Bourget (LFPB) to Los Angeles, CA (KLAX) on Canadian Automated Air Traffic System (CAATS) flight plan BOPUT NCA b 6830/70 LAT5 6630/80. The aircraft stated flight planned route was BOPUT YZS YYQ YTH YQD. Routing changed to reflect the new route. No impact on operations.

November 21, 2013

Incident at 30 NM S SYDNEY / J. A. DOUGLAS McCURDY NS (CYQY)

An American corporately registered Gulfstream GV (N50KC) from Oxford, CT (KOXC) to Paris/ Le Bourget (LFPB) squawked 7600. The aircraft was able to get contact through Gander, NL (QX). Flight called sector directly to advise they had lost all radio capability and wanted to divert to Westfield, MA (KBAF). Advised BOS and coordinated CON EEN direct KBAF, and issued to the aircraft. Flight will check in via landline with High Supervisor every 15 minutes. Flight regained radio communication at 1404Z and was given phone numbers for BOS and BDL APP in the event of another communication failure.

May 30, 2013

Incident at 70 NM E VIXUN

A13A0057: The Privajet Ltd. Airbus A319, registration 9H-GVV, was operating as PVJ283 on a flight from White Hills, NY to Paris-Le Bourget Airport. When approximately 50 nm NE of St. John's, NL (CYYT) PVJ283 declared a "PAN PAN" and requested to divert to CYYT due a cracked windshield. The flight was cleared as requested but after consulting with their maintenance department, PVJ283 requested instead to divert to Montreal-Trudeau (CYUL). The aircraft landed at CYUL without further incident.
At 0303Z, a Privajet Airbus A319 (9HGVV/ PVJ283) from White Plains, NY (KHPN) to Paris/ Le Bourget (LFPB) declared a PAN PAN and requested to divert to St John's, NL (CYYT) due a cracked windshield. Flight was recleared as requested but upon reaching FL270, PVJ283 requested a vector to Montreal, QC (CYUL). PVJ283 was recleared to CYUL. Exited Gander FIR at 0355Z.

March 25, 2012

Incident at GANDER INTL NL (CYQX)

WBA223, a Falcon 50 departing Gander (CYQX) to Paris (LFPB) was cleared to depart Runway (RWY) 31 on the CYQX Standard Instrument Departure (SID) 4, which requires the aircraft to maintain runway heading to 5000ft. The aircraft was observed on radar in a right turn and climbing through 8000ft before contacting Air Traffic Control (ATC) for further clearance and a higher altitude.

July 19, 2011

Incident at Point de compte-rendu obligatoire LOPVI

Aero Personal Falcon 7X XA-MAR, registered in Mexico, was IFR from Paris/Le Bourget (LFPB) to Tucson (KTUS). The aircraft was observed deviating from its route after the LOPVI compulsory reporting point at flight level 400. When questioned, the pilot reported proceeding direct VP in accordance with the flight plan. However, the aircraft was about 20 degrees left of its trajectory. XA-MAR was reauthorized GW. There was no other traffic nearby. No impact on ATC operations.

October 21, 2011

Incident at 60 North 50 West

UPDATE TSB: A11A0077:The Bombardier Inc BD-700-1A10 Global Express aircraft, registration N980GG, was on a flight from Paris, France to Teterboro, New Jersey. While in cruise flight at approximately 60°N 050°W a burning smell was detected in the crew rest area. The crew contacted Gander ACC to advise that the flight was turning north for an emergency descent; then requested and received clearance to the Narsarsuaq airport, Greenland. Emergency checklist procedures for cabin smoke and cabin electrical failure were carried out and the burning smell decreased when the galley circuit breakers were pulled. The flight landed at Narsarsuag airport without further incident, ARFF was standing by. Maintenance personnel determined the potable water quantity indication system experienced an electrical fault. The system was repaired and the aircraft was returned to service.
N980GG, Bombardier BD 700, enroute from Paris (LFPB) to Teterboro (KTEB) at 43,000 ft, at 17:25Z, requested clearance to descend to 40,000 ft. due to possible smoke in the cockpit. No emergency was declared. The flight was cleared to 40,000 ft. At 17:33Z, position 60 North 50 West, the pilot advised the flight was turning north 10 nautical miles in emergency descent to 15,000 ft. requesting clearance to Narsarsuaq (BGBW). Air Traffic control (ATC) passed traffic and cleared the flight to Narsarsuaq as requested. The flight landed safely at 18:15Z. Narsarsuaq advised that the aircraft reported a fire in the cockpit electrical and it was under control prior to landing. TSB Case Closed.

August 26, 2011

Incident at 47 26 N 063 51 W

N7RX, a Gulfstream IV enroute from Bernay (LFPB) to Bangor (KBGR) reported a cracked windscreen. No emergency declaration or assistance required. No impact on operation.

May 18, 2011

Incident at 20 Miles East of Ïles-de-la-Madeleine (CYGR)

N807BC, Gulfstream GIV XG450, enroute from Washington (KIAD) to Paris (LFPB) at 41,000 ft. was 20 Miles East of Ïles-de-la-Madeleine (CYGR) when the aircraft requested clearance to return to Washington due to mechanical problems that prohibited the aircraft from making the oceanic crossing. No assistance was required.

December 15, 2010

Incident at 60 miles NE of Natashquan (Gander ACC)

SVW15EX (Silver Arrows), Bombardier Global Express aircraft, enroute from Paris (LFPB) to Teterboro (KTEB), advised Air Traffic Control (ATC) of a failing front windshield and requested clearance for descent. The flight was cleared to 24,000 ft. as per request and continued to destination.

September 16, 2009

Incident at Near Halifax (CYHZ)

N101CV, Gulfstream IV, enroute from Washington (KIAD) to Paris (LFPB) was observed diverging from the CPL route. The pilot was queried as to his filed routing and re-cleared. Nil TSB.

May 23, 2008

Incident at GANDER INTL NL (CYQX)

X-APTR, CL600, enroute from Gander (CYQX) to Paris (LFPB), departed at 07:35Z and at 100 nautical miles east of Gander requested to return to the airport due to problems retracting the nose gear. No emergency was declared or assistance required. The flight held over the airport for one hour to burn off fuel and check on the nose gear. The aircraft landed safely at 10:09Z.

January 16, 2008

Incident at GOOSE BAY NL (CYYR)

N711MQ, Gulfstream G3, enroute from Goose Bay (CYYR) to Paris (LFPB) departed at 06:01Z and shortly after departure advised that it was unable to retract the flaps. No emergency was declared. The flight cancelled IFR and returned to Goose Bay.

October 21, 2007

Incident at Approximately 10 minutes east of 40W at FL330 (Weather - clear air turbulence (CAT)/turbulence, Conflict - loss of separation)

VP-BHN, Boeing 737-800, enroute from Washington (KIAD) to Paris (LFPB), requested a higher altitude clearance due to turbulence. Clearance was given to 34,000 but unable any provide clearance to a higher level due to traffic. An attempt was made to move traffic to facilitate a higher level. Before traffic was moved, the aircraft reported at 35,500 due to severe turbulence. No contingency procedures were performed. There was traffic at 35,000 and less than minimum longitudinal separation existed. Required longitudinal separation is 10 minutes. TSB Case Closed.

October 17, 2006

Incident at LOGSU (Moncton ACC)

N534QS, Gulfstream G5, enroute to Le Bourget (LFPB), received an oceanic clearance from Gander, clearance delivery in part "After LOGSU maintain FL450". Aircraft then returned to Moncton ACC frequency and advised controller "We've just received our clearance and we're leaving FL430 for FL450" The Moncton controller immediately corrected the pilot, prior to the aircraft vacating the altitude. The procedure requires that the pilot obtain a further clearance to the oceanic altitude after receiving oceanic clearance. The controller verified that the aircraft was requesting 45,000 ft. at that time, and subsequently cleared the aircraft up. Nil TSB.

September 11, 2006

Incident at GANDER INTL NL (CYQX)

VP-BBD, Dassault Falcon 50, departed from Gander (CYQX) enroute to Bangor (KBGR) with the landing gear extended and unable to retract. Originally the flight was destined to Paris (LFPB).

Incident at GANDER INTL NL (CYQX)

VP-BBD, Dassault Falcon 50, enroute from Gander (CYQX) to Paris (LFPB), advised, shortly after takeoff, of a malfunction with the landing gear. The aircraft was issued a holding clearance and at 03:00Z the pilot advised he was unable to retract the landing gear and requested to return to Gander. The aircraft landed safely at 03:57Z. Nil TSB.

June 4, 2005

Incident at Approximately 100 nm east of Gander

Trout99 C135 enroute Paris (LFPB) to Miami (KMIA), approximately 100 nm East of Gander (GYQX) declared emergency. Shutdown #1 engine due to low oil pressure indication. Landed safely at 1705Z. Nil TSB

May 5, 2005

Incident at 40 NM NE of Gander

A German-registered Diamond DA40 (D-EEII) experimental aircraft enroute from Farmingdale (KFRG) to Paris (LFPB) declared a ""Mayday, Mayday fire on board"" at approximately 0015 UTC. D-EEII at position 45NM north east of Gander, and at 25,000 feet and was given vectors to Gander. Pilot shut down his engine and glided towards Gander. Smoke reduced after shut down of engine. Engine was restarted and shut down again. Pilot reported windshield icing due to engine shut down. Search and rescue helicopter was airborne on training flight and was vectored to intercept flight. Weather conditions was VFR. Search and rescue made visual with flight and reported no sign of fire. Pilot restarted the engine for landing and landed safely at 0038 UTC. Aircraft was an experimental version for record flight. TSB Case Closed

November 21, 2004

Incident at Gander Oceanic approx. 4835N 04720W

TN590DA G3 enroute Bridgeport (KBDR) to Paris (LFPB) at 45,000 feet advised and requested descent to 25,000 feet and turnaround due to a windshield failure at 1817Z. ATC advised unable IFR clearance for descent. TN590DA declared an emergency and followed contingency procedures for descent to 27, 0000 feet. New IFR clearance then issued for the return to KBDR. TSB Case Closed

March 11, 2004

Incident at GANDER INTL NL (CYQX)

TSB - Update - A04A0025: During the climb-out from Gander, the crew of N354TC, a Canadair CL-600-2B16, requested a return due to hydraulic problems. The crew also requested the emergency equipment on standby. The aircraft was given a return clearance, and it landed back at Gander without incident. The # 3B hydraulic system had lost its contents. The cause of the fluid loss will be reported to the TSB.
A Hilton Hotels CL60 enroute Gander to Le Bourget Intl. (LFPB) requested a clearance to return to Gander due to hydraulic problems. The aircraft was given a clearance direct to Gander. There was no conflicting traffic. The aircraft advised that no assistance was required but requested to have the emergency equipment on standby. The aircraft landed at 0517Z without further incident. TSB - A04A0025 - More to Follow.

December 10, 2001

Incident at 30NM northwest of London (CYXU)

The aircraft (N944AD) was on an Instrument Flight Rules (IFR) flight from Decatur, Illinois (KDEC) to Le Bourget Airport, France (LFPB). 30NM northwest of London (CYXU) at FL370, at 1200Z, the flight crew reported smoke in the cockpit. The aircraft diverted to London immediately and landed at 1213Z after a very rapid descent. Four (4) S.O.B.
Supplemental information from T.S.B. Initial Notification (#A01O0324): The corporate Falcon 900 aircraft departed Decatur, Illinois and was destined to Paris, France. While at FL370, the flight crew observed smoke in the cockpit and declared an emergency with ATS. The aircraft diverted to London, Ontario and landed without further incident with AFF on standby. Company maintenance personnel were flown in to inspect the aircraft. They found the inertial reference system unit to be faulty and the aircraft was dispatched on MEL to return to Decatur.

March 7, 1994

Incident at Enderby PAL (Communication navigation surveillance/air traffic system)

ENDERBY PAL WENT DEAD FOR FIVE MINUTES WITHOUT WARNING. AF370V PAE - LFPB, WAS CLEARED TO FL350 DUE TRAFFIC (WRONG ALTITUDE FOR DIRECTION) WHILE TAF1311 WAS AT FL350 YC TO YVR. TUNEABLE LINE USED TO CLEAR TAF TO FL310. 6 MILE SEPARATION WITH ALTITUDE.