Narrative:

On the way back to denver computer torques were figured for the altitude the airplane was at cruise. The torque for cruise was totally different from those that would maintain 730 degrees itt (interstage, turbine, temperature). Called maintenance to have them inspect the engine and conduct any tests necessary to determine the condition of the engine, (#2 engine). Maintenance test at static condition produce 810 degrees, 10 degrees below red line. Flight xx then departed 35L at denver stapleton XA40 hours to rock springs. The aircraft weight was close to maximum ATOG, 18 passenger and a crew of 2. Upon reaching V1 with 3400 pounds of torque (unlimited torque takeoff to red line), the itt temperature was 810 degree. At V2 the temperature climbed to 830 degree and remained that way for 10 seconds whereupon the throttles were pulled or reduced to bring the itt below 820 degree. After a conference between dispatch, maintenance control, and the flight crew, dispatch and the flight crew agreed to turn back to denver. An overweight landing ensued which was documented in the logbook along with the findings of the itt's during the takeoff phase of the flight. The action taken by the flight crew was determined to be precautionary.

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Original NASA ASRS Text

Title: ENGINE PROBLEM. RETURN TO DEP ARPT. OVERWEIGHT LNDG.

Narrative: ON THE WAY BACK TO DENVER COMPUTER TORQUES WERE FIGURED FOR THE ALT THE AIRPLANE WAS AT CRUISE. THE TORQUE FOR CRUISE WAS TOTALLY DIFFERENT FROM THOSE THAT WOULD MAINTAIN 730 DEGREES ITT (INTERSTAGE, TURBINE, TEMPERATURE). CALLED MAINT TO HAVE THEM INSPECT THE ENGINE AND CONDUCT ANY TESTS NECESSARY TO DETERMINE THE CONDITION OF THE ENGINE, (#2 ENGINE). MAINT TEST AT STATIC CONDITION PRODUCE 810 DEGREES, 10 DEGREES BELOW RED LINE. FLT XX THEN DEPARTED 35L AT DENVER STAPLETON XA40 HRS TO ROCK SPRINGS. THE ACFT WEIGHT WAS CLOSE TO MAX ATOG, 18 PAX AND A CREW OF 2. UPON REACHING V1 WITH 3400 LBS OF TORQUE (UNLIMITED TORQUE TKOF TO RED LINE), THE ITT TEMP WAS 810 DEG. AT V2 THE TEMPERATURE CLIMBED TO 830 DEG AND REMAINED THAT WAY FOR 10 SECONDS WHEREUPON THE THROTTLES WERE PULLED OR REDUCED TO BRING THE ITT BELOW 820 DEG. AFTER A CONFERENCE BETWEEN DISPATCH, MAINT CTL, AND THE FLT CREW, DISPATCH AND THE FLT CREW AGREED TO TURN BACK TO DENVER. AN OVERWEIGHT LNDG ENSUED WHICH WAS DOCUMENTED IN THE LOGBOOK ALONG WITH THE FINDINGS OF THE ITT'S DURING THE TKOF PHASE OF THE FLT. THE ACTION TAKEN BY THE FLT CREW WAS DETERMINED TO BE PRECAUTIONARY.

Data retrieved from NASA's ASRS site as of July 2007 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.