What was found
(CAN) ON TAKEOFF, FLIGHT CREW HEARD A BANG, BUT CONTINUED ON. DURING CLIMB UPON FLAP RETRACTION, FLAPS REMAINED AT 5 & HYD SYS NR 1 FLUID LEVEL WAS OBSERVED DOWN TO 1 QUART. FLIGHT CREW DECLARED AN EMER & LANDED TO A NEARBY AIRPORT WITHOUT FURTHER INCIDENT. A MX TEAM TRAVELLED TO THE OUT STATION & FOUND THE RT INBD FLIGHT SPOILER ACTUATOR CASING FRACTURED. THE ACTUATOR WAS REPLACED. LEAK CHECKED & TESTED SERVICEABLE BEFORE RELEASING THE ACFT TO SERVICE.