I agree with most of the comments you all have made. A student does need to understand both Part 91.205 and 91.213. A CFI student needs a deeper understanding of the regulations than either a PVT or COM pilot and should be able to find answers for themselves.
One area I strongly disagree, however, is the comments made about a CFI being able to know or find all answers without having to seek help from another professional (ie mechanic or another pilot). Maybe I am reading to deeply into the comments and that was not the intent, however, if it is I'd like to give any 121/125/135 bound pilots some advise.
Accept the fact that you don't know everything and be willing to seek help from others. When I administer a 135 checkride students have at thier disposal anything they would have on the line. This includes FARs, Opts manuals, AFM/POH, and MANAGEMENT! This includes the CP, ACPs, DO, Training Captians, or Check Airman. They can also call dispatch for direction however I stongly advise them to be cautious of dispatch advising on regualations as I have seen a helpful dipatcher offer incorrect information. With that being said, I do expect a student to have a good grasp on FARs and Opts Specs without having to look up everything.
If you plan on a professional career in aviaition and you choose to NEVER seek advise of another qualified professional it is only a matter of time before you misintrepet an FAR or Opts Sec and break the rules. If you ever are unsure and cannot find clarification for yourself I suggest you immediately seek the help of another professional. They publish the names and contact numbers of company management in the Opts Manual for this reason.
On a recent checkride with the FAA the examiner and I got to talking about this very subject and how pilots choose not to call for assistance. He said when he administers checkrides for small 135 operators who don't have check airman, he fails applicants when they can't answer any line related questions. They to have the above mentioned items at thier disposal and if they were to call for assistance and get an answer from management he would continue the checkride as that is what they should do on line. Items he asks about could be something as simple as not correctly entering a maintenence discrepenancy (squwak) in the maintenance log or correctly deferring an item on the MEL.
In our program, since most students are airline bound, we emphasise if you don't know the answer get help (don't be too proud). Now I expect our sudents have a good understanding of FARs and know how to find things for themselves, but if you get stuck get clarification before you do something illegal or unsafe.
As for this particular checkride, I think this was a very weak reason to stop the checkride. I think the student was doomed from the start as the examiner was very unhappy about my endorsements (which were right out of the AC) and proceded to make negative comments about our school from the get go. I found while giving 121/135 rides that you can fail every student on a checkride if you really want to; even very experienced line pilots with grey hair.
I trained/gave checkrides to a few pilots who were graduates of the program the examiner operates. Many were excellent pilot, however, some were very deficient. I believe I even suggested the compnay discontinue training one due to his deficieny in general aviation knowledge. I struggle with this checkride, not becuase I believe the student didn't make mistakes, but because I don't think the checkride would have ended if it were a student from the examiners own program.
As for the endorsements the examiner didn't like; he wanted me to include an endorsement in the student's logbook that I am qualified to teach CFI students. Has anyone ever heard of this before? I am uncomfortable with the as the FARs prohibit a CFI from endorsing themselves and I believe this could construed as such. Also he wanted me to include an endorsement that I had reviewed all the subject areas listed on the students knowledge exams. In the past I have only made this endorsement for re-tests following a student failing a knowledge exams. Is it requirement now to endorse the subject areas for students who pass the knowledge exams also? His resoning was 61.39; "if applicable," to me means if the student failed the knowledge exam. I'd appreciate any feedback on this particular endorsement.