39 FREIGHT TRANSPORTATION SERVICES, NAMELY THE LOADING AND UNLOADING OF AIRCRAFT WITH LUGGAGE, LETTERS AND FREIGHT, RECEIPT OF AND CHECKING ARRIVING FREIGHT, PRESENTATION OF FREIGHT DOCUMENTS TO CUSTOMS, PREPARATION OF DELIVERED FREIGHT FOR TRANSPORT BY AIRPLANE, ISSUANCE OF AIRFREIGHT DOCUMENTS AND OTHER FREIGHT DOCUMENTS, ASSEMBLING FREIGHT FOR DEPARTURE, HANDLING ARRIVING AND LEAVING LETTERS; TRANSPORTATION OF PASSENGERS, LUGGAGE, LETTERS AND FREIGHT BETWEEN AIRCRAFTS AND TERMINALS; PROVIDING ASSISTANCE TO PASSENGERS OF TRANSPORTATION BY AIRCRAFT, NAMELY PASSENGER INFORMATION SERVICES, PASSENGER CHECK-IN AND GUIDANCE FOR PASSENGERS AT AIRPORTS; LEASING OF VEHICLES FOR STARTING TURBINES VIA PRESSURIZED AIR, GROUND ELECTRIC GENERATORS AND PASSENGER ESCALATORS; TOWING AIRCRAFT; FREIGHT STORAGE