What was found
DURING CLIMBOUT NR 4 LT L/E SLAT DID NOT RETRACT. RAN QRH. RETURNED TO DEPARTURE. JUMPER INSTALLED ON NR 4 SLAT ACTUATOR. DO TO IND OF EXTEND POSITION. MM 27-82-000-1-0, INSTALLED NR 4 L/E SLAT EXTEND SWITCH JUMPER. SYS GROUND CHECKS NORMAL. JUMPER INSTALLED TRANSFERED TO OIL NR 471234. R & R NR 4 SLAT ACTUATOR IAW MM 27-81-032-4. REMOVED JUMPER IAW BSWPM 20-60-06. R& R NR4 SLAT POSITION EXTEND SWITCH IAW MM 27-82-011-4. OPS & LEAK CHECKED NORMAL IAW MM 27-81-000-5 AND 27-82-011-4.