What was found
SLC - FLT 504 - AT TOP OF CLIMB, NOTED INDICATION OF ZERO HYDRAULIC QUANTITY. NO LIGHTS AND NO OTHER HYDRAULIC INDICATIONS. ASSUMING AN INDICATION ERROR, FLIGHT PROCEEDED. WHILE ON A 15 MILE FINAL APPROACH TO SLC, AN ASSIGNED SPEED OF 170 KNOTS CAUSED CREW TO EXTEND FLAPS. AT FLAPS 2 DEGREES, A LOSS OF A-SYSTEM PRESSURE WITH ALL ASSOCIATED WARNING LIGHTS HAPPENED. PROCEDURES WERE FOLLOWED FOR THE LOSS OF A-SYSTEM. A MANUAL GEAR EXTENSION AND ALTERNATE FLAP EXTENSION PROCEDURES WAS FOLLOWED AND A NORMAL FLAPS 15 DEGREE LANDING WAS ACCOMPLISHED. SERVICED HYDRAULIC A-SYSTEM AND ON WALK-AROUND, FOUND NR 2 BRAKE LINE LOOSE. SECURED LINE. OPS CHECKED GOOD PER MM 12-12-0. AIRCRAFT RELEASED FOR SERVICE. (X)