After the union for WestJet’s 1,850 pilots sent the airline and government a 72-hour strike notice Monday night, the airline says it will lock out pilots Friday morning.

WestJet points out issuing a lockout notice does not mean a work stoppage will happen.

However, it’s started preparing to operate a reduced schedule, manage changes and cancellations and provide flexible change and cancel options for travellers who want to change plans.

Should there be delays or cancellations, WestJet says those impacted would be refunded or re-accommodated as applicable.