Service difficulty report · Oil System · Boeing 777224

Difficulty date
January 10, 2026
Submitted
January 15, 2026
Operation
Air carrier
Aircraft
N27015
Make and model
Boeing 777224
Aircraft serial
28678
Aircraft time
118,584 hours, 12,176 cycles
Engine
Ge GE9090B
Part
Oil System
Condition
Low
Location
Nr 1 Engine
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

RIGHT ENG OIL QTY 0 QTS, OIL PRESS HOVERING AROUND 20 PSI. NR 1 ENGINE IS THE DISCREPANT ENGINE. INITIAL OIL SVC ACCOMPLISHED. ADDED NR 1 ENG 26QTS, AND NR 2 ENG-4QTS. 40 MIN IDLE RUN CARRIED OUT PER TEST NR 5 IDLE LEAK CHECK IAW AMM 71-00-00-700-805-G00. AFTER SHUTDOWN CHECKED PLASTIC BAG AROUND DRAIN MAST FOUND JUST 1 DROP OF OIL FOUND. COWL OPENED AND INSPECTED AREA, NO OBVIOUS LEAK NOTED. ONLY SLIGHTLY WET FOUND AROUND STARTER AREA IAW AMM 71-71-00-700-802-G00. RAN ENGINE AT 70% N1 FOR A PERIOD OF TIME TWICE SPECIFIED W ITH AMM 71-71-00-700-802-G00, AFTER TEST 5 IDLE LEAK CHECKS PERFORMED IAW AMM 71-00-00-700-805-G00, FOUND A FEW DROPS IN BAG AT FIRST RUN, NO DROP AT SECOND. IAW PILOT REPORT, TECH ACCOMPLISHED IN-FLT WINDMILLING INSPECTION AMM 71-00-00-200-812-G00, NO/LOW OIL PRESSURE INSPECTION IAW AMM 71-00-00-200-811-G00, HIGH POWER LEAK CHECKED AMM 71-00-00-700-8 49-G00, OIL CONSUMPTION HIGH/LOW OIL QTY FIM 71-05 TASK 805. DMS INSPECTION 79-00-00-200-806-G00 ACCOMPLISHED, NO DEBRIS FOUND AT DMS, AGB, & TGB. CAPPED AGB DRAIN LINES IAW AMM 71-71-00-700-802-G00, STEP 2.1.(3)(B). CAPPED AGB OIL DRAIN LINES FOR MAX 25 FLIGHT CYCLES. PERFORMED IDT INSPECTION FOR DMS SENSOR ON #1 ENG,INSTALATION OK REF AMM TASK 79-00-00-200-806-G00.