As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI, YELLOW LEVEL SYSTEM LOW LEVEL WAS PRESENTED. CONFIRMED LEAK. IN ACCORDANCE WITH AMM 29-13-15-000-001-A THE PTU MANIFOLD OF THE YELLOW HYDRAULIC POWER WAS REMOVED. IN ACCORDANCE WITH AMM 29-13-15-420-050-E THE PTU MANIFOLD WAS REPLACED, OPERATIONASL TEST SATISFACTORY TORQUE: P/N: QD2FR75 S/N: 0617120531 DUE DATE: 11 SEP 2023