The aftershocks of the two-day strike by WestJet’s mechanics that grounded its fleet, and disrupted the travel plans of 170,000 customers over the busy Canada Day weekend, continue to rumble.

There were more cancelled flights last week, and frustrated customers say that the airline’s customer service operation remains unreachable.

Inevitably, angry travellers are pointing the finger of blame at WestJet. But the airline, in turn, is furious at what it calls a “rogue” American union representing the mechanics — the Airplane Mechanics Fraternal Association — and (unofficially) at the federal labour minister, Seamus O’Regan, whom they accuse of “incompetence and dithering.”