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http://www.avherald....=46a4a76e&opt=0
The report can be read here: http://www.airproxbo...3.09Reports.pdf
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A Lufthansa Boeing 747-800, registration D-ABYC performing flight LH-418 from Frankfurt/Main (Germany) to Washington Dulles,DC (USA), was enroute at FL320 nearing Glasgow,SC (UK) tracking roughly 305 degrees and had issued a request for FL340 about 5 minutes prior to the occurrence, the controller had confirmed receiving the request and stated "standby".
A British Airways Boeing 747-400, registration G-BNLM performing flight BA-87 from London Heathrow,EN (UK) to Vancouver,BC (Canada), was enroute at FL340 nearing Glasgow,SC (UK) roughly tracking 330 degrees.
About three minutes prior to the occurrence the Scottish Center Montrose Sector controller cleared LH-418 to climb to FL340. The aircraft climbed to FL340 reaching FL340 when both aircraft were about 24.3nm horizontally apart but closing. The controller noticed the impending conflict about 3 minutes later, at 12:55:22Z the low priority short term conflict alert activated at his control desk a few seconds later when the aircraft were 9.8nm horizontally apart. The controller wanted to issue instructions to ensure separation however was unable due to some other aircraft talking on the frequency. When able to the controller instructed BA-87 to turn to the left onto a heading of 270 degrees stating "avoiding action, Speedbird eight seven, turn left immediately heading two seven zero degrees, traffic in your right one o'clock", which was correctly read back by the crew including using the full callsign, then LH-418 was instructed to turn right onto a heading of 050 (instruction "Lufthansa four one eight, avoiding action, turn right immediately heading zero five zero degrees, traffic in your left eleven o'clock", which also was read back correctly using the flight number only.
A British Airways Boeing 747-400, registration G-BNLM performing flight BA-87 from London Heathrow,EN (UK) to Vancouver,BC (Canada), was enroute at FL340 nearing Glasgow,SC (UK) roughly tracking 330 degrees.
About three minutes prior to the occurrence the Scottish Center Montrose Sector controller cleared LH-418 to climb to FL340. The aircraft climbed to FL340 reaching FL340 when both aircraft were about 24.3nm horizontally apart but closing. The controller noticed the impending conflict about 3 minutes later, at 12:55:22Z the low priority short term conflict alert activated at his control desk a few seconds later when the aircraft were 9.8nm horizontally apart. The controller wanted to issue instructions to ensure separation however was unable due to some other aircraft talking on the frequency. When able to the controller instructed BA-87 to turn to the left onto a heading of 270 degrees stating "avoiding action, Speedbird eight seven, turn left immediately heading two seven zero degrees, traffic in your right one o'clock", which was correctly read back by the crew including using the full callsign, then LH-418 was instructed to turn right onto a heading of 050 (instruction "Lufthansa four one eight, avoiding action, turn right immediately heading zero five zero degrees, traffic in your left eleven o'clock", which also was read back correctly using the flight number only.
Edited by Iain_, 22 October 2013 - 11:13 AM.
