What was found
CREW OXYGEN SYSTEM HAS A LEAK. CREW OXYGEN BOTTLES FOUND TO BE EMPTY. BOTH BOTTLES WERE DEPLETED FULLY TO 0 PSI. CAPTAINS CREW OXYGEN MASK QUICK DISCONNECT FITTING WAS FOUND DISCONNECTED INSIDE THE CREW OXYGEN STOWAGE BOX ALSO. UPON FURTHER INVESTIGATION IT WAS DISCOVERED THAT PIPE FITTINGS FOR THE SUPPLY AND DISCHARGE LINES WERE NOT SWAGED: CREW OXYGEN SYSTEM SUPPLY LINE AND DISCHARGE LINE FITTINGS/OLIVES NOT SWAGED ON THE LINES. THE B-NUTS WERE FOUND OVER TIGHTENED - NOT POSSIBLE TO LOOSEN. THE SUPPLY LINE FITTINGS NOT BEING SWAGED WOULD HAVE CAUSED A LARGE LEAK IN THE SYSTEM. ALL LINES IN THE AREA OF THE CREW OXYGEN BOTTLES WERE REMOVED TO DETERMINE HOW MANY FITTINGS HAD DEFECTS. FOUND QTY 3 FITTINGS IN TOTAL NOT SWAGED.