Is it required to perform temperature mapping in a 5.3 cu ft refrigerator?  This is for blood and iStat cartridge storage at an airplane hangar.  It will be on our temperature monitoring system.   It seems too small for needing mapping, but I have never done it myself so don't know how small an area requires it.   Any advice appreciated.

I have no supporting references but for me, common sense dictates that in a space that small you could not get the probes far enough apart to get any significant temperature variations.  Having said that, regulations, requirements or other such problems seldom involve anything resembling common sense.  Much like common courtesy, common sense is seldom common.