As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE CREW SHUTDOWN NR 1 ENGINE DUE TO LOSS OF OIL QTY. THEY LANDED WITHOUT FURTHER INCIDENT. MX INPECTED NR 1 ENGINE AND FOUND OIL DIFFERENTIAL PRESSURE SWITCH HOUSING CRACKED. THEY REPLACED OIL DIFFERENTIAL PRESSURE SWITCH. OPS CHECK GOOD IAW MM 79-33-1, 79-20-7 AND ERH 70.01.1. ACFT WAS RETURNED TO SERVICE.