What was found
NR 1 EGT RED LINE W/STANDARD PWR SET ON TAKEOFF ROLL. PREMATURE REMOVAL/INSTALLATION, OFF MFG 10276N01T00 POS P1 SRL D1000CA TAG 02015A ON MFG 10276N01T00 SRL D983CA TAG 533139. REMOVED AND REPLACED NR 1 EGT INDICATOR, LUBED BLEED VALVES CLEANED PS4 FILTER ELEMENT PER AMM 71-000-1. PERFORMED ENGINE RUN PER JRH CHAPTER 5 EGT INDICATIONS WERE NORMAL EPR=1.83 EGT=500 DEG, A/C OK FOR SERVICE.