my aircraft was returned to DJI Hong Kong on 21 Jan 2016. How can I check the status of repair ? When should I expect the delivery ? The DJI online repair process inquiry system doesn't work as it requested PI number or tracking number  which I don't have. I've got only a case number.

Thanks DJI. the status could be checked by phone number. And finally, the repaired aircraft arrived today. Thanks DJI for the speedy action.