Service difficulty report · Chip Detector · Boeing 747412F

Difficulty date
June 12, 2026
Submitted
June 15, 2026
Operation
Air carrier
Aircraft
N489MC
Make and model
Boeing 747412F
Aircraft serial
26553
Aircraft time
122,237 hours, 21,289 cycles
Engine
Pwa PW4056
Part
Chip Detector
Condition
Unsecure
Location
Nr 1 Engine
Stage of operation
CR
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

ENGINE 1 OIL QUANTITY LOSS IN FLIGHT, SHOWING 0 AT CRUISE STARTED AT 10 AFTER TAKEOFF. ACCOMPLISHED ENGINE OIL INSPECTION PER ECM 2026P-203 REV 0. NO LEAKS FOUND. NOTED MASTER GEARBOX CHIP DETECTOR IN RT THRUST REVERSER COWLING. INSPECTED AND REINSTALLED CHIP DETECTOR IAW AMM 79-21-10. ACCOMPLISHED HIGH POWER, NO LEAKS NOTED IAW AMM 71-00-00.</P>)