What was found
ATL/TPA - FLT 101 - RETURNED TO ATL DUE TO UPON RAISING LANDING GEAR, NOSE GEAR UNSAFE LIGHT REMAINED ON. RIGHT GEAR UNSAFE LIGHT REMAINED ON ALSO. REMOVED AND REPLACED PROXIMITY SWITCH BOX, PN 008-0004-004, SN OFF 254, SN ON 263. OPERATION SELF-TEST IAW VALUEJET MM 32-00. AIRCRAFT WAS TEST FLOWN, OPS CHECK OKAY.