Regional Jet 900 (CRJ900)
Maintenance Airframe; Maintenance Powerplant
Training / Qualification; Confusion; Workload
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Illness / Injury
General Maintenance Action
Environment - Non Weather Related; Human Factors; Procedure; Aircraft; Staffing
Pilot report that his right inboard brake was not actuating. Supervisor in Charge; Name; decided to change the right inboard brake. Assignment was given to Name 1. I; Name 2 was behind the desk that day printing all necessary paper work; Name 1 calls for assistance due to having brake jack issues. Name 3 and myself arrived at Aircraft X to help Name 1. Name 3 was in the cockpit monitoring hydraulic system and brake temp. I assisted Name 1 with lifting and changing the right inboard brake only due to the brake jack having issues and the weight of brake. Name 1 told me he was good from there and he will take care of the rest such as brake fittings; brake lines and brake temp sensor. I received a call from my Supervisor; also I sent pictures of what happened. After spending nearly an entire year without touching an aircraft due to the pandemic it is a possibility that Name 1 might of had a relapse reading the job card.  After hearing about the incident from the Supervisor I was upset; frustrated that having done the job in the past; this could have happened. But I was more relief to know that problem was caught and rectified before something serious happened that could have put our customers; crew and aircraft in jeopardy. To read and ask as much question as needed in order to perform our duties in compliance with company and FAA policies.
Technician reported a coworker struggled with a main wheel brake change and made errors during installation; even with help; possible due to lingering COVID issues.