Several problems have been occurring across all type of check rides. Some of them I thought were put to rest years ago. The biggest thing you can do to help yourself or your student (or Learner as the FAA wants these days) is to be familiar with the applicable ACS or PTS. Here is a quick rundown....
1. Using a POH/AFM that doesn't apply to the aircraft we are flying. For example, using a 172S model POH for performance data when we are flying 172M model.
2. Using generic weight and balance data instead of the actual empty weight and CG of the aircraft we are flying. This includes finding the Actual weight and balance in the aircraft POH/AFM.
3. Relying on EFB data too much. These are wonderful tools but they have limitations and can produce inaccurate information. Remember, garbage in equals garbage out. Be able to explain where the data going in came from and what are some of the ways that you verify the data is correct.
4. If the student is old school and uses paper, that's fine but again, be able to explain how you got your answers. For example, several applicants planned a cross country using a cruising speed in MPH, measured the distance in NM and the winds aloft in KTS.
5. Aircraft systems. Simply put, applicants don't know their aircraft. Sure you will be asked questions on systems but a lack of knowledge show up during preflights as well.
6. Stall and Spins. I ask a scenario question that a lot of people miss. That scenario is based on a real accident. Another easy question I ask, What's more important during stall recovery, Adding power or lowering the nose? You wouldn't believe the number of people that get that wrong.
That's all for now. Fly Safe!