Helicopter Pilot reported the MGT gauge indicated an overtemp condition. The pilot stated the problem had occurred several times before and was corrected by maintenance or corrected itself and chose to fly the aircraft with the overtemp condition in violation of policy.

Narrative

The reason for the unairworthy aircraft was the MGT (Measured Gas Temperature) gauge displayed an exceedance when the aircraft battery switch was on. However; the aircraft never actually had an exceedance. It was due to a known issue with that specific manufacture part number. It had happened in the past to this particular aircraft multiple times over the course of a few months and was always addressed when it made an appearance.Where I did wrong and the reason for this report is due to the fact that I flew the aircraft with that exceedance still in the system. I had noticed right after turning the battery switch on that the exceedance was displayed on the MGT gauge. I thought to myself it could have been impossible as I had never exceeded any limits during start. To add to this; during preflight at the beginning of my shift; I did not see any exceedances displayed in any of the gauges or on the system in general. For that reason coupled with the fact that this aircraft has done this exact thing before due to known issue in the part number was the reason I wrongfully decided to clear the exceedance and proceed to fly to my destination not only once but twice. I pushed the clear button on two separate occasions for two different flights with two different start ups. It was not the right thing to do. At the time I did not think I was in the wrong as I knew it wasn't indicating an exceedance prior to the flight or even during my preflight. It was until the second flight on my way back to the destination. I started to think to myself and was viewing it from a different point of view. A point of view of a mechanic; an FAA rep; or just plainly another pilot and what I thought of was very simple. The helicopter is throwing an exceedance code and it's telling me something is wrong. Therefore; it should have been grounded and the thought of is it real or not should have died then and there. It isn't up to me to justify on moving forward or finding a solution on whether it's a real exceedance or not. The moment I saw an 'E' on the MGT gauge should have been the moment I wrote up a discrepancy and let the Mechanics figure out the problem. As soon as I got to base; I stuck it in the hangar and did the right thing by calling our Maintenance department to take care of the discrepancy.The next morning I got a hold of my Supervisor and I told him what happened which in turn; rightfully made it up the chain to our Chief Pilot. It was in the best interest that I get sent back to [home base] and get remedial training for my decision and actions that one night. On top of the additional training; I will also be written up on our companies 'Performance Improvement Plan.' I have learned not to justify anything regardless if it is right or wrong; even if it's a true exceedance or not. Not just with exceedances but this applies to every single aspect surrounding us in the aviation community. Procedures; Limitations; Emergency and normal procedures are all put in place for our safety. All these are black and white and very clear in what is right or wrong. This incident which in turn; would make me safer in the future. This will be a lesson learned from here on out in my career. A lesson that I will carry on my shoulders and be told for years to come. I am one to speak up about times like this as someone else might not make the same mistake as I did that night.