Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 107; Flight Crew Total 401; Flight Crew Type 302
Communication Breakdown
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Loss Of Aircraft Control
Aircraft Aircraft Damaged; Flight Crew Returned To Gate; Flight Crew Regained Aircraft Control; Flight Crew Rejected Takeoff; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft; Company Policy; Human Factors; Procedure
During take off; the decision was made by the PIC(self) to abort owing to a bang and the aircraft pulling left requiring extreme right rudder use.  It was later determined by the PIC this was due to the spring loaded rudder trim jumping to the left from the right. It had previously been advised by the other flight instructors at the school to leave the rudder trim in the right side position during all phases of flight; owing to a extreme left turning tendency. However; by doing this it put undue stress on the rudder trim spring and when left rudder was used during take off the spring gave way and released the trim fully left. At the time this cause was not known to the PIC; hence the decision to abort the flight. Later it was advised that this should be in neutral; as per the POH; however incorrect local guidelines had been advised.  PIC will revert to the POH for all future use in Aircraft X.
Pilot reported a Rejected Take Off after hearing a loud bang.