What was found
(CAN) AT CRUISE AIRCRAFT EXPERIENCED HYDRAULIC SYSTEM 1 FAILURE MESSAGE, ALONG WITH A LOW PRESSURE AND LOW QUANTITY INDICATION. DECLARED PAN PAN WITH ATC, AFTER LANDING AIRCRAFT TAXIED TO THE GATE UNDER OWN POWER. CRF WAS ADVISED AND PRESENT. EDP REMOVED PER AMM 29-11-01-000-801A. EDP INSTALLED PER AMM 29-11-01-400-801A.