What was found
(CAN) DURING CRUISE A/C LOST HYDRAULIC PUMP NR 1. QRH CONSULTED AND FOLLOWED BY ACTIVATING STBY PUMP. PRESSURE RESTORED TO NR 1 ONE SYSTEM. RETURNED TO BASE AND MADE A UNEVENTFUL LANDING. INVESTIGATION/ACTION, ENGINE DRIVEN PUMP (EDP) FOUND SEIZED AND CONSEQUENTLY REPLACED ACC AMM 29-11-01. HYDRAULIC SYSTEM NR 1 FLUSHED AND BLEED ACC AMM 29-10-00. HYD SYSTEM NR 1, PRESSURE, RETURN AND CASE DRAIN FILTERS REPLACED.