The technician that was servicing your machine made an error that can save the author some money. If you have proof of purchase for your applecare, and it was bought within the 1st year, there is an option for to add applecare to said unit. Dept on the situation, and how far the unit is out of warranty they would have to call an agreement admin, and have it added to the unit. Of course this could all be done in one appointment, Order the part, call the admin, when the part comes in repair the unit.

I blame the technician for not supporting the client, now of course the client was nuts for thinking that they could offer a turn around time for this machine in a day with no parts in stock.

There is also the testing phase to consider which adds several hours to the machines repair time, if not overnight.