As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC NR 1 LOW PRESSURE CAUTION MESSAGE ILLUMINATED INFLIGHT, COMPLIED WITH QRH, FLUID QUANTITY INDICATED ZERO. FOUND PRESSURE LINE ON LT EDP LOOSE AND TIGHTENED IAW 51-40, OPERATION TEST AND FUNCTION TEST OF EDP PERFORMED IAW AMM 29-11-01, CHECKED GOOD. SERVICED HYD NR 1 SYSTEM. (M)