B737-700
Maintenance Powerplant; Maintenance Airframe
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Departure Airport; General Flight Cancelled / Delayed
Human Factors; Procedure
Aircraft X had an air return to ZZZ due to the fact that the No.1 Engine was under power. It was later discovered that the wrong PN (Part Number) ID Plug was installed. On the night I was assigned to the engine change Job Card XXX-00-01; I failed to verify the thrust rating. As my bid location of the engine shop for the last few years I am aware that Job Card XXX-00-01 is compiled in the engine shop when the engine is configured or an ID plug is installed. Normally I verify the thrust rating as I do the other Job Card XXX-00-01 to check EEC software PN. On the Job Card XXX-00-01 Configuration Verification on the ID plug I verified the pins configuration where correct and quick glance at what I thought was the part number since the ID plug had a stamp along the true part number of XXX-660-201-0. After engine change we verified the engine made the 65% N1 and all parameters where within limits. As per task; it does not require to take the thrust above the 65%.
Inspector reported they failed to verify the thrust rating after an engine change resulting in the aircraft returning to departure airport.