What was found
CREW REPORTED, LANDING GEAR NOT RETRACTING. FLIGHT HAS DECLARED AN EMERGENCY AND HAS ELECTED TO DIVERT TO OAK. AT 6000' QRH 13.5 FOLLOWED SELECTING GEAR UP. GEAR RETRACTED NORMAL WITH ALL INDICATIONS NORMAL. NO OVERWEIGHT SITUATION IN OAK. AIRCRAFT WILL REQUIRE TO BE FERRIED TO A FACILITY WHERE GEAR SWINGS CAN BE CONDUCTED. UNABLE TO RAISE GEAR LEVER ON T/O. FOLLOWED QRH 13.5 - NO LG WOW SYS FAIL EICAS MSG. PRESS AND HELD DN LOCK REL GEAR LEVER UP AND ALL IND NORMAL. WAS NOT AN OVER-WEIGHT LANDING. PERFORMED FIM TASK 32-33-00-810-801. FOUND TO BE FAILURE OF THE SPDA1 SLOT 13 REMOVED & REPLACED SPDA1 SLOT 13 IAW AMM 24-61-13. PERFORMED LANDING GEAR EXTENSION AND RETRACTION ON JACKS OPS TEST IAW AMM 32-33-00-710-801. OPS CHECK GOOD. NO FURTHER DEFECTS NOTED AT THIS TIME. A/C OK FOR SVC.