What was found
N1 & N2 SLOW TO REDUCE BELOW 45% N1 WHEN RETARDING THRUST LEVER. TAKES APPROX 30 SECS TO REDUCE TO IDLE. ( #1 ENGINE )<[01] R&R #1 ENG IDG PER [AMM 24-11-11-401-NG (INTEGRATED DRIVE GENERATOR (IDG) - REMOVAL/INSTALLATION - PERMANENT)]. NO HELP.;[02] R&R #1 ENG HMU PER [AMM 73-21-10-401-NG (HYDROMECHANICAL UNIT - REMOVAL/INSTALLATION - PERMANENT)] AND #1 ENG FUEL PUMP PER AMM 73-11-01. OPS CHECK GOOD.;[03] C/W CA #2 RII OF HMU R&R;[04] R&R #1 ENG HMU PER [AMM 73-21-10-401-NG (HYDROMECHANICAL UNIT - REMOVAL/INSTALLATION - PERMANENT)] AND #1 ENG FUEL PUMP PER AMM 73-11-01. OPS CHECK GOOD.