What was found
AIR DIVERSION, EMERGENCY DECLARED, IN FLIGHT SHUT DOWN. AIRCRAFT DIVERTED TO SHV AFTER DEPARTURE FROM SAT WITH REPORT OF OIL PRESSURE LOSS ON NR 2 ENGINE. ENGINE OIL QUANTITY DROPPED TO ZERO, OIL TEMPERATURE BEGAN TO CLIMB. OIL PRESSURE DROPPED TO 35 PSI. NR 2 ENGINE SHUTDOWN. AIR DIVERT TO SHV. FOUND CRACK IN OIL TANK ADJACENT TO OIL QUANTITY PROBE. REMOVED AND REPLACED OIL TANK IAW DC-9 MM 79-10-01-2-0001. REMOVED OIL SCREEN ELEMENTS AND INSPECTED FOR METAL AND FOREIGN MATTER, NONE FOUND. ACCOMPLISHED IAW P&W 72-00. PERFORMED ENGINE RUN IAW DC-9 MM 71-00-00-5-007. NO LEAKS NOTED. OPS CHECKED GOOD.