As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 engine oil qty dropped to zero (0) after flt level 27.0 #1 eng oil press flux between 40-30 psi then 30-20 psi then steady no psi. Aircraft made unscheduled landing @ MSY. No fuel was dumped. Aircraft landed normally.Corrective Action: Found "D" sump scavenge line leaking. Changed out scavenge line segment and gamma fitting I/A/W MM 20-00. Inspected Engine chip detectors for signs of bearing failure. All checked satisfactory. Line leak check satisfactory. Aircraft returned to service.