In FL/EQ function, do you set Deactivate of FL/EQ when it breakdown?

We use the Deactivate status for F/L's and Eq. no longer in use. This prevents notifications and work orders being processed.

If the breakdown will be corrected in three weeks, deactivate the equipment and re-activate after job is done?
If the priority assigned is high enough to prompt the corrective order to the top of the list and it is fixed in 3 days? 1 day? Deactivate / Reactivate after job is done?

No, only de-activate when the equipment is not longer to be used.

Some failures does not take the equipment out of operations completely. Then after first failure ocurrs and Operator creates a maintenance notification, it gets supervisor approval, and then the planner generates a corrective maintenance order. While the corrective order is planned, scheduled, executed, and finally closed; other failures may occur that will need maintenance notifications/orders.
If the equipment is deactivated after the first failure, a second notification can not be entered.

No.

SAP Help on deactivating master data records states

"You use this function if:

· The technical object has been scrapped but you want to keep its data in the system for statistical reasons."

If the equipment breakdowns, just tick the breakdown box to prompt users to record downtime start & end dates.

If the equipment is replaced with a spare, it has to be dismantled & installed the spare equipment no. If just repair the existing equipment, no need to dismantle.

If the functloc or equipment is no longer used, deactivate it.

So, how to prevent the Preventive maintenance order generate on equipment?

You can dismantle the equipment from its funcloc if you wish to prevent triggering of PM especially if the equipment is removed from its location for a long duration.

Another option you can skip the next generation of WO in the PM scedhuling screen if the next one is not planned yet.

Otherwise, once triggered, maybe just close the WO with comment "equipment is not running, removed or whatever valid reasons.