May 14, 2018

Incident at 4700N / 04000W

An automated controller-pilot data link communications (CPDLC) ?UM137? request was sent to a K.L.M. Royal Dutch Airlines Boeing 747-400 (KLM686) from Mexico City International, Mexico (MMMX) to Amsterdam/Schiphol, Netherlands (EHAM) to confirm the route, however, the aircraft response of a ?DM40? message indicated an incorrect route in the Flight Management System (FMS) after 20W. The flight was re-cleared as per its oceanic clearance. No traffic.

June 14, 2015

Incident at 47N40W

With their 40W report, a KLM Royal Dutch Airlines Boeing 747 400 (PHBFC/ KLM686) from Mexico City, Mexico (MMMX) to Amsterdam, Netherlands, (EHAM) indicated that their north coordinate at 20W was 50N. The coordinated route was 49N20W. The flight was recleared to conform with the correct profile.

May 10, 2011

Incident at Coordonnées 4847N/6939W

KLM686, a Boeing 747-400 operated by KLM Royal Dutch Airlines that was on an IFR flight from Mexico (MMMX) to Amsterdam (EHAM), flew a different route (46/78 YBC STEAM OYSTR) than the one air traffic control had (46/78 YBG VALIE OYSTR). No impact on ATC operations.

September 3, 2010

Incident at Approximately 49N 047W (ATS operating irregularity)

UPDATE TSB: A10A0093: N361K, a corporate Dassault Falcon 900, was en route from Nice, France to Gander at F360. KLM686, a KLM Royal Dutch Airlines Boeing 747-400, was en route from Mexico City to Amsterdam at F370 on a converging track with N361K. The flight crew of N361K requested and received a clearance to climb to F380. The clearance was issued without a restriction and though the required separation of 15 minute lateral and 1000 foot vertical was maintained, separation between the two aircraft was not assured. NAV CANADA is convening an OSI Level One into the incident.
N361K, Dassault Falcon 900, enroute from Nice (LFMN) to Gander (CYQX), was issued clearance to climb from 36,000 ft. to 38,000 ft. without restriction with opposite direction KLM686, Boeing 747-400, enroute from Mexico City (MMMX) to Amsterdam (EHAM) at 37,000 ft. Clearance was issued with ample time to reach the cleared altitude prior to the time required but without a restriction issued, separation was not assured. TSB Case Closed.

September 27, 2009


KLM686 reported an strong ELT at 0402Z 20 NM E of YOO at FL350. The signal was reported to fade at 0412Z 20NM S YYZ. RCC advised they were tracking a signal in Hamilton.

September 21, 2008

Incident at Gander Oceanic Airspace

KLM686, Boeing 747-400, enroute from Mexico City (MMMX) to Amsterdam (EHAM), followed the flight plan instead of the original clearance issued at 05:25Z via data link routing 56/50 57/40 57/30 57/20. A revision was issued at 05:32Z re-routing the flight to 56/50 57/40 57/30 56/20. When the aircraft reported 40W, the forward estimate for 20W was incorrect. The flight was issued instructions to route via 56/20 at 07:30Z.

November 24, 2006

Incident at 140 NM southwest of Gander

KLM686 B747-400 enroute Mexico (MMMX) to Amsterdam (EHAM) declared a passenger medical emergency and requested to divert to Gander (CYQX) at 0730Z position 140NM southwest of Gander. ATC cleared flight as requested and aircraft landed safely in Gander at 0758Z. Nil TSB

November 23, 2006

Incident at 80 miles east of Engle FL370 (Moncton ACC)

UPDATE TSB: A06A0119: KLM686, an eastbound B747-400 at FL370, was flight planned and cleared by NYOAC via SLATN, A700, ENGLE, CARAC; however, the aircraft flew CREEQ direct CARAC. New York Control later confirmed with Moncton that the aircraft had not been cleared on the direct routing from CREEQ to CARAC. There was no loss of separation.
KLM686, Boeing 747-400, enroute from Mexico City (MMMX) to Amsterdam (EHAM) was flight planned and cleared by the New York OAC ...SLATN A700 ENGLE CARAC...but the aircraft flew CREEQ direct CARAC. On initial contact the aircraft confirmed that the clearance from New York was as filed but subsequently stated that they had been cleared CREEQ "probably" direct CARAC. New York OAC confirmed the aircraft had not been cleared on the direct routing. TSB Case Closed.

November 29, 2005

Incident at GOOSE BAY NL (CYYR)

KLM686, Boeing 747-400 enroute from Mexico (MMMX) to Amsterdam (EHAM) at approximately 0910Z, declared a Medical Emergency and requested to land at Goose Bay (CYYR). Aircraft dumped fuel 80 to 100 nm south of Goose Bay. Nature of the problem was a 40-year-old male with heart problems. Landed at 0959Z. Nil TSB.

July 24, 1993

Incident at CALGARY