Maintenance Airframe; Maintenance Powerplant
Maintenance Technician 20
Communication Breakdown
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; Procedure
Aircraft X experienced and rollback and unresponsive throttle immediately after takeoff. It was found that the rib of the thrust reverser cowl had rubbed through the CDP line going to the fuel control. This lead to an engineering order to set up all of the same series motors on the 767 fleet to be inspected for the same problem. I was sent with another technician to ZZZ to inspect Aircraft X. On inspection of both engines we determined that both lines had slight wear and out of caution both should be replaced. We addressed the clearance issue and replaced both lines. The Engineering Revision Authorization (ERA) stated that ETOPS would not be affected. So we signed off the work and released the aircraft. The aircraft made two flights before this was found and had a re-inspection in ZZZ1 to verify that the repair was good. Looking back being that both technicians were ETOPS qualified we should have made a call to [Maintenance] to verify what we were reading to be correct.
An ETOPS qualified Maintenance Technician signed off work and released a Boeing 767 for service not realizing that it required an inspection sign off also.