As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 8 SCAVENGE OIL LINE FROM ENGINE GEARBOX TO VERNATHERM CRACKED INSIDE THE B-NUT SLEEVE AT GEARBOX. THIS LED TO SIGNIFICANT LOSS OF OIL AND A PRECAUTIONARY SHUTDOWN IN FLIGHT. AC RETURNED DEPARTURE, UNEVENTFUL LANDING, REPLACED OIL LINE. (K)