What was found
AFTER TAKEOFF, RIGHT GEAR UNSAFE LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION. RECYCLED GEAR, NO CHANGE, FOLLOWED BY THE GEAR DOOR OPEN LIGHT ILLUMINATING. TURNED ON THE RIGHT HYDRAULIC PUMP AND THE GEAR DOOR OPEN LIGHT WENT OUT WITH THE GEAR UNSAFE LIGHT REMAINING ON. FLEW TO ILN WITH THE PUMP ON AT .70 MACH. CLEANED AND LUBRICATED THE RIGHT GEAR UPLATCH MECHANISM, PERFORMED ADJUSTMENT AND TEST IAW DC-9 SUPP MM 32-60-00, OPS CHECKED GOOD.