What was found
HYD 2 HI TEMP CAUTION MESSAGE SHORTLY AFTER TAKEOFF. COMPLIED WITH QRH PROCEDURE AND RETURNED TO FIELD. TEMP REACHED A MAXIMUM OF 98 DEGREES C. IT COOLED DOWN A BIT AFTER QRH PROCEDURE, THEN BEGAN TO INCREASE AGAIN ON APPROACH TO LANDING, REACHING 93 DEGREES C AT THE GATE. FLIGHT 3066-FILED CLOSED. TROUBLESHOT HYDRAULIC SYSTEM NR 2 AND FOUND ACMP NR 2 OPERATING AT 2200PSI. REMOVED AND REPLACED ACMP NR 2 IN REFERENCE TO AMM. LEAK AND OPERATIONS CHECK GOOD AT THIS TIME. TEMPERATURE STILL INCREASING RAPIDLY, NO FIX. PLEASE REFERENCE AML 509226.