What was found
THE AIRCRAFT AND CREW WERE APPROXIMATELY THIRTY MINUTES FROM LANDING AT TJSJ. AT THAT TIME AN AMBER CAS MESSAGE ILLUMINATED FOR HYDRALIC VOLUME LOW. THE CREW COMPLETED THE APPROPRIATE SECTION OF THE QRH AND PROCEEDED TO TJSJ, DECLARED A PRECAUTIONARY EMERGENCY, BLEW THE GEAR DOWN, LANDED AND STOPPED AIR CRAFT UTILIZING THE EMERGENCY BRAKE SYSTEM. THE CREW CALLED THE FBO GROUND CREW TO MEET THEM AT THE RUNWAY, AND TOW THE AIRCRAFT TO THE FBO. EVERYTHING WAS DONE PER TEXT BOOK, AND NO FURTHER ACTION FROM THE CREW WAS NEEDED.