What was found
DURING GEAR RETRACTION WE HEARD A RUMBLING NOISE, MULTIPLE YELLOW CAS MESSAGES ILLUMINATED INCLUDING GEAR DISAGREE, ADC SSEC MISCOMPARE, GEAR DOOR OPEN, AND FOR GEAR POSITION INDICATIONS DN IN A YELLOW BOX FOR THE NOSE, THEN TWO CROSS HATCHED YELLOW BOXES FOR EACH OF THE MAINS. STARTED THE CHECKLIST WITH GEAR DOOR OPEN. RAN THE CHECKLIST AND WERE ABLE TO EXTEND THE GEAR USING THE GEAR HANDLE RECEIVING A 3 GREEN INDICATION. REPLACED SQUAT SWITCH. OPS CHECK GOOD. IAW MM 32-60-10.