Service difficulty report · Engine · Boeing 7378H4

Difficulty date
February 17, 2025
Submitted
February 21, 2025
Operation
Air carrier
Aircraft
N8520Q
Make and model
Boeing 7378H4
Aircraft serial
42532
Aircraft time
26,871 hours, 13,416 cycles
Engine
Cfmint CFM567B27E
Engine time
26,871 hours, 13,416 cycles
Part
Engine
Condition
Leaking
Location
Zone 400
Stage of operation
CL
How discovered
V
Nature of condition
K, O
Precautionary procedure
D, O

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

What was found

BEGAN WITH 87% OIL QUANTITY ON ENGINE #2. AFTER TAKEOFF IT WENT TO 1% WITH WHITE BOX. AFTER REDUCING THRUST OIL QUANTITY INCREASED TO 15% TO 30%. WHEN ON GROUND WHEN INCREASING THRUST OIL QUANTITY DROPS SIGNIFICANTLY. PERFORMED #2 ENGINE EXTERNAL OIL SYSTEM INSPECTION PER AMM 79-00-00; FOUND EVIDENCE OF OIL LEAK INSIDE OF PRIMARY EXHAUST NOZZLE. PERFORMED #2 ENGINE EXTERNAL OIL SYSTEM INSPECTION PER AMM 79-00-00; FOUND EVIDENCE OF OIL LEAK INSIDE OF PRIMARY EXHAUST NOZZLE AND STAGE 4 LPT BLADE/ TURBINE FRAME STRUT AT 6 O'CLOCK POSITION. R & R #2 ENG IAW MT 771-00-01. INSPECTED PER AMM 79-00-00-200-802-F00-NG (EXTERNAL OIL SYSTEM INSPECTION - PERMANENT)

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