What was found
(CAN) DURING REVENUE FLIGHT WITH PAX ON BOARD, PILOT NOTICED GEN LIGHT ON & NG DROPPED 20%. ENG HAD AN UN-COMMANDED SHUTDOWN. PILOT RETURNED TO GATE & THE FLIGHT WAS CANCELED. NO INJURIES REPORTED. FSR INVESTIGATION ONGOING. MFG WILL INVESTIGATE TO ESTABLISH ROOT CAUSE & PROVIDE INFORMATION TO TRANSPORT CANADA THROUGH SUBSEQUENT SERVICE DIFFICULTY REVIEW MEETING & SUPPORTING DOCUMENTS OR OTHER AGREED UPON COMMUNICATIONS.