After you sent out medicals, just wait. Some people received PPR a few months after they submitted their medicals results, some were required to provide additional documents depending on your application.
Regarding to "landing" at airport. Honestly I don't know. I found this CIC office address on CIC website. Does it help?
Newfoundland and Labrador
St. John’s
Appointments
21 Hallett Crescent, Suite 106
St. John’s, NL
A1B 4C4
Mailing address
P.O. Box 13667
St. John’s, NL
A1B 4C4
If not, I would contact officer at airport by phone or in-person to ask.