What was found
AFTER GEAR RETRACTION UNLOCK LIGHT STAYS ON. GEAR EXTENDS NORMALLY WITH NORMAL INDICATIONS, PILOT STATED, EN ROUTE TO HOU FROM DAL. DIVERTED INTO SAT AS A PRECAUTION. THERE WERE NO PASSENGERS ON BOARD AND NO EMERGENCY ACTION TAKEN. REMOVED 1 INOP BULB AND INSTALLED A NEW BULB, OPS CHECK GOOD. REF FAS WO 03-2256 FOR DETAILS. THIS ITEM IS STILL UNDER INVESTIGATION.