There’s been union disputes for a while at Qantas, but the move to ground the international and domestic mainline fleet a day after the Qantas AGM is a surprise.
Affected flights (at time of writing)
Qantas operated international (and other airline codeshares on those flights)
Qantas mainline domestic
Unaffected flights (at time of writing)
Jetconnect (trans-Tasman flights except for A330 service between Auckland and Sydney)
Qantaslink domestic flights (numbered 1400 to 2699)
Qantas codeshare flights on other airlines