Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument; Other CFI-G
Flight Crew Last 90 Days 100; Flight Crew Total 3500; Flight Crew Type 800
Confusion; Training / Qualification; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Human Factors; Procedure
I went to the ZZZ area to pick up a Super Viking that a customer wanted me to fly/train with him to ZZZ1.  The aircraft was coming out from an annual inspection and I inspected it as an airplane out of serious maintenance. I noticed some play in the prop blades but it was consistent on all blades; and coming out of inspection; I assumed that it was the way the prop was.When we landed in ZZZ; I had the prop inspected by a mechanic who found the prop 'questionable' and recommended not to fly the aircraft. Prop was dismounted and sent to a prop shop which found the prop non airworthy. I had never seen a broken prop and I pride myself to inspect and teach to inspect CS props very carefully.  Maybe we should have more documentation about props.
BL-17 pilot reported the propeller had excessive movement in the blades and decide to have maintenance inspect it after a flight and it was found to be non airworthy.