What was found
PILOT REPORTED ENGINE QUIT IN-FLIGHT AND REQUIRED A DEAD STICK LANDING. ENGINE RESTARTED ON THE GROUND AFTER A SAFE LANDING. MAINTENANCE MADE ADJUSTMENTS TO FUEL SERVO AFTER NOTICING HIGHLY ERRATIC FUEL FLOW INDICATIONS. ALL GROUND CHECKS WERE NORMAL. ACFT TEST FLOWN WITHOUT INCIDENT UNTIL THE FINAL LANDING AT WHICH TIME THE ENGINE STAMMERED AND NO RPM'S WERE INDICATED, BUT CAME BACK ON TIME WHEN THROTTLE WAS ADVANCED. FUEL CONTROL/SERVO WAS REMOVED AND A KNOWN SERVICEABLE SERVO WAS INSTALLED. ACFT TEST FLOWN, ALL CHECKS GOOD.