Update – 1700Z / 05Oct:
Each airport is dealing with PPR individually, so best to make contact locally for full requirements.
Please see our main Maria post here for individual airport and PPR requirements.
First Hand Accounts: http://flightservicebureau.org/ops-reports-puerto-rico/
Airport Aviation Services – (787) 797-8500 / (787) 424-9499 / firstname.lastname@example.org
Western Aviation Service – (787) 890-2323 / email@example.com