What was found
CENTER HYDRAULIC QUANTITY DECREASED OF 0.02 PERCENT. SYSTEM DEPRESSURIZED AND LANDED WITH ALTERNATE FLAPS AND GEAR WITH NO INCIDENT. REMOVED AND REPLACED O-RING ON FILTER CAP ON NR 4 SPOILER ACTUATOR ASSY. LEAK CHK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CENTER HYDRAULIC QUANTITY DECREASED OF 0.02 PERCENT. SYSTEM DEPRESSURIZED AND LANDED WITH ALTERNATE FLAPS AND GEAR WITH NO INCIDENT. REMOVED AND REPLACED O-RING ON FILTER CAP ON NR 4 SPOILER ACTUATOR ASSY. LEAK CHK GOOD.