What was found
CREW REPORTED THAT AFTER TAKEOFF, RECEIVED A HYD SYS 1 LOW QTY MSG DURING GEAR RETRACTION. RETURNED TO FIELD & LANDED WITHOUT INCIDENT.. SERVICED HYD SYS 1. FURTHER, INSPECTIONS WERE COMPLETED ON THE FLIGHT CONTROLS, THE BRAKE SYS, THE HYD SYS, THE SPOILER & ENG 1. NO LEAKS WERE NOTED & THE ACFT WAS RETURNED TO SERVICE.