As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI IN OIL FILTER BYPASS LIGHT CAME ON NR 1 ENGINE FOLLOWED CHECKLIST AND SHUTDOWN ENGINE NO OTHER PROBLEMS. ACFT GROUNDED. REPLACED NR 1 SCAVENGE OIL FILTER IAW AMM 79-21-04-400-801-F00, NO CONTAMINATION NOTED. REPLACED SCAVENGE OIL FILTER CLOGGING TRANSMITTER/DIFFERENTIAL PRESSURE SWITCH IAW AMM 79-21-07-400-801-F00. ACCOMPLISHED EEC TEST AND IDLE RUN IAW POWERPLANT TABLE. TEST PASSED LEAK CHECK GOOD.