As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON GROUND RUN: WHEN HYDRAULIC TEST PUSH BUTTON DEPRESSED AND ACCUMULATORS EMPTY, THE CYCLIC WOULD MOVE HARD TO THE LEFT. SWITCHED LT SERVO AND RT SERVO. THIS PROBLEM MOVED WITH SERVO TO THE RT SIDE. INSTALLED A NEW OVERHAUL SERVO ON THE RT SIDE WHICH CLEARED UP OUR PROBLEM. AC HYDRAULIC SYSTEM NOW OPERATES IAW TYPE. (TC NR 20060221007)