Failed to meet annual requirements or marked U on some aspect of the APART? I don't see how this is a chapter. If the former applies then CDR's investigation in your 7122s. If it's the latter then you just need to demonstrate proficiency. I mean did you show up drunk to your stands eval? I have never heard of a pilot FEBed for failing an APART.
Edit: I don't know your situation and NCM records are a little different than RC records...still this doesn't sound right. Is this outcome just what your SP is telling you? Have you verified this in the 3-04.11?