FLC OF AN MLG RETURNED TO LAND AFTER THE TAIL COMPARTMENT HIGH TEMP WARNING LIGHT ILLUMINATED.

Narrative

AFTER DEP FROM ONTARIO IAP; WITH ACFT CLEANED UP AND CLB ESTABLISHED; TAIL COMPARTMENT TEMP HIGH AND ASSOCIATED MASTER WARNING LIGHT ILLUMINATED. CAPT WAS FLYING AND TOOK OVER RADIO DUTIES. I ACCOMPLISHED ITEMS ON QUICK REF CHKLIST WITH NO AFFECT. I CONTINUED TO THE DETAILED CHKLIST IN OUR COCKPIT MANUAL TO ITEM -- R ENG IDLE. AT THAT POINT WE WERE HEADED NW TOWARD THE MOUNTAINS AT ABOUT 10000 FT. WE REQUESTED A WESTWARD VECTOR TO PARALLEL MOUNTAINS; BUT DUE TO PROX TO LAX ARR AND DEP TFC; WERE GIVEN A 360 DEG TURN. THIS WAS SATISFACTORY AND ONCE THE TURN WAS ESTABLISHED; WE RETARDED THE R THROTTLE AND AS THE THROTTLE CAME BACK; THE WARNING LIGHT WENT OUT. WE COMPLETED THE REMAINING CHKLIST ITEMS AND REQUESTED A RETURN TO ONT. WE WERE VECTORED TOWARD THE ARPT; GIVEN A DSCNT AND TURNED OVER TO SOCAL APCH. I BRIEFED THE FLT ATTENDANT LEAD AND MADE A PA TO THE PAX ADVISING THEM OF OUR RETURN TO THE ARPT. WE DECLINED TO DECLARE AN EMER SINCE THE WARNING LIGHT WENT OUT AT A TIME WHEN WE WOULD EXPECT IT TO EXTINGUISH. APCH AND LNDG WERE UNEVENTFUL AND WE ARRIVED AT THE GATE 41 MINS AFTER DEPARTING. THE ACFT HAD A RECENT WRITE-UP FOR THE SAME WARNING. HOWEVER; AFTER THIS INCIDENT A LEAKING GASKET WAS FOUND IN ONE OF THE HOT AIR BLEED LINES. A MORE THOROUGH INSPECTION ON THE PREVIOUS OCCASION COULD HAVE SAVED OUR RETURN TO BASE.