What was found
IAD/IND - FLT 6724 - DURING APPROACH AT 1415 HRS ON 4-3-98, AIRCRAFT MADE ABORTED APPROACH INTO IND DUE TO LANDING GEAR FAILED TO EXTEND NORMALLY AND CREW USED EMERGENCY EXTENSION. AIRCRAFT LANDED AT IND AND WENT TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND PERFORMED GEAR SWINGS AND COULD NOT DUPLICATE PROBLEM AND RECEIVED NO FAULT CODES. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)