What was found
DURING FLIGHT NR 3482, NR 3 ENGINE HYDRAULIC TEMP LIGHT CAME ON. FOLLOWED QRH AND MX PROCEDURES, AFTER COOLING AND APX 50 MILES OUT FROM LANDING TURNED PUMP BACK UNDER DIRECTION OF MXC-DID NOT ILLUMINATE. AIR RETURN TO MEM. MAINTENANCE REPLACED PTU IAW AMM 29-20-17 PN 4204002 SN/ON LW85, SN/OFF OH75 AND REPLACED AIRBRAKE SERVO VALVE AS A PRECAUTIONARY MEASURE IAW AMM 27-63-14, PN P458A0101-02 SN/ON DAW 51-98 SN/OFF DAW49-98 RAN GREEN SYSTEM HYDRUALIC NO HIGH TEMP INDICATION NOTED.SEE 409 NR 181762 AND CONTINUATION NR 040003,040004,040000,039971 AND 039693 FOR FURTHER DETAIL.