What was found
(CAN) LOSS OF POWER REPORTED AFTER TAKEOFF 150 RPM LOSS REPORTED ENGINE INSPECTED AND RT MAGNETO WAS NOTED THAT THE CAM WAS LOOSE IN THE DRIVE SHAFT. A NEW CAM WAS INSTALLED BUT FOUND TO ALSO BE LOOSE. MAG TTSN 215.6 HRS. LT MAGNETO WAS THEN INSPECTED AND FOUND TO HAVE THE SAME PROBLEM. TTSN 423.3 ON LT MAGNETO. BOTH MAGNETOS REMOVED FROM SERVICE. BOTH MAGNETS WERE FOUND TO BE WITHIN THE DATE CODES SPECIFIED MFG SL L264 AND SLICK SERVICE LETTER 74-20-001.