What was found
PILOT DECLARED AN EMERGENCY DUE TO ENGINE FAILURE. EXPERIMENTAL FUEL SERVO, PN 2524307-10 HAD THE MID-RANGE AND HIGH RANGE TEST POINTS OUT OF LIMITS WITH EXCESSIVELY RICH FLOW. DUE TO SERVO MODIFIED WITH COMPONENTS THAT WERE NOT PART OF THE ORIGINAL DESIGN. THIS SERVO IS NOT A TC`D PART AND IS FOR USE ON EXPERIMENTAL AIRCRAFT ONLY. RECOMMENDATION IS TO REPAIR/ O/H/ MAINTAIN WITH ORIGINALLY DESIGN COMPONENTS