What was found
SEA - UPON GEAR UP SELECTION LEFT DOOR AMBER AND LT GEAR RED UNSAFE LIGHTS LAG 7 SECONDS AFTER ALL OTHER GEAR LIGHT GEAR LIGHT EXTINGUISH THIS TIME LAG HAS INCREASED FROM 4 SECONDS TO 7 SECONDS OVER LAST THREE GEAR UP SELECTIONS. RETURNED TO THE FIELD AND ACCOMPLISHED A UNEVENTFUL LANDING. FERRY TO PDX FOR REPAIR. REMOVED AND INSTALLED SERVICEABLE LT MLG RETRACT/EXTEND ACTUATOR IAW TASK 32-31-11-000-801 AND 32-31-11-400-801. OPERATIONAL CHECK IAW 32-31-00-710-801 TR32-240. CHECKS GOOD. RETURNED TO SERVICE.