September 29, 2013

Incident at SAINT JOHN NB (CYSJ)

Departure with VSBY 3/8 SM JZA791 DH8A V3/8 RVR2200 0844Z DR23

March 2, 2010

Incident at CALGARY INTL AB (CYYC) (Weather - visibility, Conflict - potential, ATS operating irregularity)

UPDATE A10W0040: Due to the reduced visibility in freezing fog (RVR2200 for runway 16), the Calgary Airport was operating under their reduced visibility operations plan (RVOP). Runway 16 was the only active runway and there were 12 aircraft lined up for departure from the threshold, 2 from taxiway 'C4' and 1 from taxiway 'U' at mid field. After a BAE HS125, CNK744, departed from the threshold, a de Havilland DHC-8-100, NCB801, was instructed to line up and wait at the threshold of 16. NCB801 was the aircraft at taxiway 'U'. The data on the EXCDS (electronic flight strip) for NCB801 indicated a departure from 'U'. The flight crew of NCB801 queried the controller about the instruction and the recent take-off clearance for CNK744 but did not identify that they were on 'U'. The tower controller confirmed the instruction and advised NCB801 to be ready for an immediate. As NCB801 was crossing the hold line at 'U', CNK744 was overhead climbing through 500 feet. NCB801 departed from 'U' a few moments later.
Wx 1/2 SM FZFG BKN002 OVC005. Rwy 16 is active and RVOP in effect. Tower controller departed CNK744 from the threshold, rwy 16. Tower then instructed NCB801 to "line up threshold 16." NCB801 was in fact sitting at Uniform taxiway awaiting departure and read back the line up instruction. The FDE on the EXCDS did indicate NCB801 departing rwy 16 from uniform (mid-field). NCB801 queried the Tower controller if he should proceed onto the runway after hearing the take-off clearance for CNK744. The Tower controller responded in the affirmative and informed NCB801 to be prepared for the immediate due to inbound traffic. The Tower controller then departed NCB801
UPDATE TSB Edmonton has classified their investigation as a Class 3 and a Minister's Observer has been appointed.