Service difficulty report · Warning Message · Boeing 7379

Difficulty date
September 2, 2024
Submitted
September 5, 2024
Operation
Air carrier
Aircraft
N969AK
Make and model
Boeing 7379
Aircraft serial
67421
Aircraft time
4,499 hours, 1,222 cycles
Engine
Cfmint LEAP1B28
Part
Warning Message
Condition
False Activation
Location
Bypass Filter
Stage of operation
DE
How discovered
O
Nature of condition
N
Precautionary procedure
E, A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

#1 ENG FILTER BYPASS INFLIGHT, INFLIGHT SHUTDOWN. GROUNDED - YES. ACCOMPLISHED TSR 716465 UP TO STEP 7. FOUND MAGNETIC METAL MATERIAL IN THE SCAVENGE FILTER AND ON THE ODMS SENSOR. ODMS POD WAS USED AND THE SCAVENGE FILTER ROUTED TO AOG ENGINEERING FOR ANALYSIS. ALL SCAVENGE SCREENS WERE REMOVED AND FOUND NO DEBRIS. INSTALLED ALL SCAVENGE SCREENS AND SCAVENGE FILTERS IAW TSR. MAINTENANCE MESSAGE:79-42890 DESCENT, OIL FILTER IMPENDING BYPASS FAULT CODE: 79330251. REQUIRES TROUBLESHOOTING. COMPLETED 70 PERCENT RUN FOR 10 MINUTES INSPECTED ODMS AND SCAVENGE SCREENS, NO PARTICLES FOUND. INSTALLED ODMS REF AMM 79-21-12-400-801-G00 AND SCAVENGE SCREEN PLUGS REF AMM 79-21-04-400-801-G00. LEAK CHK GOOD. ACCOMPLISHED INFLIGHT WINDMILLING INSPECTION REF AMM 71-00-00-200-807-G00. TSR 716465 COMPLETE. FINDINGS REPORTED TO AOG ENGINEERING CONSULTED AND ADVISED RETURN TO SERVICE. REF LOGPAGE 60787795 FOR SIGNIFICANT EVENT PROCESS COMPLETED AND AIRCRAFT RETURN TO SERVICE AUTHORIZATION BY SEAMC.

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