What was found
CREW REPORTED- E1 OIL PRESS DECREASED TO AMBER RANGE AT APPROX PASSING 15000FT. OIL QTY WAS ALSO DECREASING. SHOWN 3 ON QTY. QRH PROCEDURE RAN FOR E1 LOW OIL PRESSURE. SHUTDOWN ENG PREEMPTIVELY & RETURNED TO DAL. MX OPENED THE ENG 1 COWLING AND FOUND STATOR ALTERNATOR DISCONNECTED & HANGING FROM ENG. FOUND CLAMP BOLT HAD SHEARED & FAILED CAUSING ALTERNATOR TO DISCONNECT FROM AGB CAUSING MASSIVE OIL LEAK. R & R THE STATOR ALTERNATOR. TORQUED & SAFETIED NEW CLAMP. ENG SERVICED WITH OIL. LT STATOR ALTERNATOR OPS CHKD GOOD. INSPECTED MAGNETIC CHIP DETECTOR, DRAINED OIL & PUT NEW OIL, INSPECTED ALTERNATOR STATOR, R & R V-CLAMP & HIGH-POWER ENGINE RUN, OPS CHECK GOOD, NO DEFECTS NOTED.