Narrative:

During the takeoff roll; the #2 itt read higher than usual but still under the maximum limit of 765. We rotated; and during the initial climb; it started to increase and was getting very close to 765. The power management was selected to climb at 800 ft AGL. The increase of itt slowed; but as we passed 1000 ft; it went over 765 to stabilize at 770 for a few seconds. I pointed this out to the first officer. It finally decreased to 707. We returned to ZZZ notified maintenance control and operations; and made an entry in the aircraft book. The following day; I was called into the chief pilot's office to explain what happened. I was told that maintenance said that; according to the ACARS; the itt did not exceed 754. I was surprised since both; the first officer and myself; read 770 off the itt gauge. My decision to return to ZZZ and make an entry in the aircraft logbook is supported by what we observed. Callback conversation with reporter revealed the following information: the reporter stated the internal turbine temperature (itt) was read directly by both crew members from the internal turbine temperature indicator which is calibrated to the engine. Maintenance disputes the temperature recorded in the logbook and states the maximum temperature at 754 degrees citing ACARS data transmitted to the center. The reporter states the indicator is the most accurate and the data sent by the ACARS is sent at programmed intervals and perhaps was sent during an interval when the temperature was in fact 754. The maintenance center must have checked the engine using the 754 degree temperature as maximum as the airplane was routed out on a trip within 2 hours. The maintenance action taken if any is unknown by the reporter.

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Original NASA ASRS Text

Title: AN ATR72 ON TKOF CLB AT 1000 FT #2 ENG INTERNAL TURBINE TEMP WENT TO 770 DEGS. MAX LIMITS PER THE ACFT OPERATING MANUAL IS 765 DEGS. RETURNED TO THE DEP ARPT.

Narrative: DURING THE TKOF ROLL; THE #2 ITT READ HIGHER THAN USUAL BUT STILL UNDER THE MAX LIMIT OF 765. WE ROTATED; AND DURING THE INITIAL CLB; IT STARTED TO INCREASE AND WAS GETTING VERY CLOSE TO 765. THE PWR MGMNT WAS SELECTED TO CLB AT 800 FT AGL. THE INCREASE OF ITT SLOWED; BUT AS WE PASSED 1000 FT; IT WENT OVER 765 TO STABILIZE AT 770 FOR A FEW SECONDS. I POINTED THIS OUT TO THE FO. IT FINALLY DECREASED TO 707. WE RETURNED TO ZZZ NOTIFIED MAINT CTL AND OPS; AND MADE AN ENTRY IN THE ACFT BOOK. THE FOLLOWING DAY; I WAS CALLED INTO THE CHIEF PLT'S OFFICE TO EXPLAIN WHAT HAPPENED. I WAS TOLD THAT MAINT SAID THAT; ACCORDING TO THE ACARS; THE ITT DID NOT EXCEED 754. I WAS SURPRISED SINCE BOTH; THE FO AND MYSELF; READ 770 OFF THE ITT GAUGE. MY DECISION TO RETURN TO ZZZ AND MAKE AN ENTRY IN THE ACFT LOGBOOK IS SUPPORTED BY WHAT WE OBSERVED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE INTERNAL TURBINE TEMP (ITT) WAS READ DIRECTLY BY BOTH CREW MEMBERS FROM THE INTERNAL TURBINE TEMP INDICATOR WHICH IS CALIBRATED TO THE ENG. MAINT DISPUTES THE TEMP RECORDED IN THE LOGBOOK AND STATES THE MAX TEMP AT 754 DEGS CITING ACARS DATA XMITTED TO THE CTR. THE RPTR STATES THE INDICATOR IS THE MOST ACCURATE AND THE DATA SENT BY THE ACARS IS SENT AT PROGRAMMED INTERVALS AND PERHAPS WAS SENT DURING AN INTERVAL WHEN THE TEMP WAS IN FACT 754. THE MAINT CTR MUST HAVE CHKED THE ENG USING THE 754 DEG TEMP AS MAX AS THE AIRPLANE WAS ROUTED OUT ON A TRIP WITHIN 2 HRS. THE MAINT ACTION TAKEN IF ANY IS UNKNOWN BY THE RPTR.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.