What was found
(CAN) AFTER TAKE OFF AND DURING CLIMB IT WAS OBSERVED THAT THE LT OB KRUGER FLAP WAS NOT RETRACTED. BOTH INDICATIONS SHOWED THE KRUGER WAS STILL EXTENDED. THE AIRCRAFT MADE AN UNSCHEDULED LANDING WITHOUT INCIDENT. JUMPER ASSY WAS INSTALLED IAW B727-27-80-02, L/E FLAP JUMPER CABLE INSTALLATION, AND CHECKED SERVICEABLE. THE AIRCRAFT WAS RELEASED FOR SERVICE. NO FURTHER PROBLEMS DURING SUBSEQUENT FLIGHT.