Lonewolf_50, I believe the preliminary report includes comments regarding the thoroughness of snags. If one had an altimeter or airspeed discrepancy beyond published limits, one fixes it of course, but sometimes the only way of ensuring they are working correctly is to test them at altitude.
The stickshaker on the previous flight wasn't conveyed in the snag. The investigation needs to determine why not - what "hat" was being worn when that piece of information was not provided?