What was found
AIRCRAFT MADE-AIRPORT PRECAUTIONARY LANDING DUE TO 3 MOMENTARY ENGINE SURGES ACCOMPANIED BY AN ASSOCIATED LOW NR WARNING HORN. PILOT STATES LANDING WAS NORMAL, AND MADE THE LANDING FOR A PRECAUTIONARY SAFETY CHECK. MAINTENANCE REPLACED SEVERAL COMPONENTS INCLUDING THE HMU, FADEC AND DEECU. IT IS BELIEVED TO BE THE HMU WHICH CAUSED THE SURGE, HOWEVER, THIS IS NOT CONCLUSIVE. SUBSEQUENT FLIGHTS AFTER THE COMPONENT CHANGES PROVED GOOD. (K)