EMB ERJ 170/175 ER/LR
Maintenance Powerplant; Maintenance Airframe
Workload; Troubleshooting; Fatigue; Confusion; Training / Qualification
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
Aircraft Aircraft Damaged; General Flight Cancelled / Delayed; General Maintenance Action
Procedure; Manuals; Equipment / Tooling; Aircraft
Aircraft X was at ZZZ to change the Emergency/Parking Brake cable. I was on the crew that finished installing and adjusted the cable; working the adjustment of the cable. I had safe tied the two lower jam nuts below the bracket on the handle end of the cable to each other; then over the bracket to the jam nut on top of the bracket. I used the safety cable kit for this task. The brake cable being installed does not have the locking support tab to facilitate easier safety of jam nuts. On my way to work the next day as I was driving. It occurred to me that that safety cable would cut through the bracket over time due to movement of the cable as the handle is actuated. When I arrived at work I notified the supervisor of my mistake and the plane was removed from service. The manual is not very clear about how to safety this this jam nut for this location. I was using Emb-170 AMM task 32-XX-XX for my reference. [The figure] shows the technique for a nut and jam nut at location X which is not where I was working. I corrected the safety procedure of my location to illustration X and returned the aircraft to service. The task 20-XX-XX Typical safetying methods; does not cover this situation with the jam nut. It was getting close to the end of my 12hr shift and I should have thought this thru more carefully. I also think that the Embraer manuals should be more explicit when it comes to different types of safetying situations.
Technician reported not following procedures to replace a cable due to fatigue and confusion.