AN EMB145 FO RPTS AT CLB PWR 1 ENG HAS 30-70 DEGS HIGHER INLET TURBINE TEMP THAN #2 ENG. TEMPS STILL IN GREEN BAND.

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WE WERE CLBING THROUGH FL340 WITH THE THRUST LEVERS IN THE 'THRUST SET' POS AND THRUST RATING 'CLB' WHEN WE NOTICED THAT THE #1 ENG ITT WAS APCHING THE AMBER RANGE. THE ITT'S BTWN THE 2 ENGS DIFFERED BY ABOUT 70 DEGS. A FEW SECONDS LATER; THE ENG #1 ITT DID GO INTO THE AMBER RANGE. WE REDUCED THRUST ON THAT ENG AND THE ITT IMMEDIATELY REDUCED ACCORDINGLY. WHEN WE LEVELED OFF AT FL360 AND SWITCHED TO THRUST RATING 'CRUISE' THE ITT WAS WELL WITHIN THE GREEN RANGE AND THE ITT SPLIT BTWN THE 2 ENGS WAS ABOUT 30 DEGS. WE LOOKED INTO THE AOM VOLUME 1 TO SEE IF THERE WAS ANY PROCS WE SHOULD FOLLOW; BUT FOUND ONLY A PROC IF THE ITT HAD GONE INTO THE RED RANGE; WHICH DID NOT APPLY TO OUR SIT. WE SENT A MESSAGE TO DISPATCH TO ADVISE THEM OF THE SIT. DISPATCHER REPLIED THAT MAINT SAID TO JUST MONITOR THE PARAMETERS; AND MAINT WOULD LOOK AT IT UPON ARR. THE FLT CONTINUED UNEVENTFULLY WITH ALL ENG PARAMETERS WELL WITHIN NORMAL PARAMETERS AT ALL TIMES. AML ENTRY WAS MADE UPON BLOCK IN. ALSO; AFTER LNDG; EICAS MESSAGE 'E1 EXCEEDANCE' APPEARED. ON THE OUTBOUND LEG TO SAV (THE LEG BEFORE THIS ONE) WHEN WE WERE LEVELING OFF AT FL350; WE NOTICED THAT ENG #1 ITT WAS IN THE UPPER RANGE OF THE GREEN RANGE; BUT NOT IN THE AMBER. THE ITT SPLIT BTWN THE ENGS WAS; I THINK; AROUND 60 DEGS. WE WERE A LITTLE CONCERNED BECAUSE THIS WAS NOT USUAL AND THE #1 ENG HAD A SEAL REPLACED ON IT 2 DAYS PRIOR. WE CONTACTED MAINT TO ADVISE THEM OF THE ENG PARAMETERS. WHILE THE CAPT FLEW THE AIRPLANE; I TALKED TO MAINT CTL. THE GENTLEMAN SAID THAT WE PROBABLY JUST HAD AN OLD ENG BUT THAT HE WOULD RESEARCH FURTHER AND THAT WE SHOULD CALL HIM ON THE GND IN SAV. WHEN WE CALLED HIM FROM SAV; HE TALKED TO THE CAPT. HE TOLD US THAT ENG #1 DID NOT SHOW ANYTHING OUTSIDE OF LIMITS; INCLUDING THE PARAMETERS THAT WE TOLD HIM. HE SAID THAT MAINT CTL WAS AWARE THAT DURING THE PAST 2 YRS THAT ENG WAS RUNNING A LITTLE HOTTER THAN NORMAL; BUT SINCE IT WAS STILL IN THE GREEN RANGE; THERE WAS NO ACTION THAT NEEDED TO BE TAKEN. HE TOLD US THAT THEY WOULD PROBABLY SCHEDULE THE ENG TO BE CHANGED IN THE NEXT FEW WKS. IN SUMMARY; WE WERE SAFE TO FLY BECAUSE THE ENG WAS OPERATING WITHIN NORMAL PARAMETERS.