Hello All,
I am guessing you are in a training environment. Let me say.... you should always write up a item that doesn't meet limitations as published. If your instructor says it is ok....ask why? If they say don't worry about it....change instructors. A pilot's job... is to fly a airworthy airplanes. This requires the ability to say "no" if the airplane is not up to standards. In my carrier, as a pilot, I have written up hydralics, electrical, stand by instumentents....etc. Not because I didn't want to fly but because I was required to fly an airworthy airplane. Remeber.... you should always ask questions about why an instrument is not registering a correct indication. You can only gain knowladge by asking.
Dustertoo