Regional Jet 900 (CRJ900)
Maintenance Powerplant; Maintenance Airframe
Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance
General Maintenance Action
Aircraft; Human Factors
I followed tasks for installation of the main landing gear lower anti-rotation sleeve in accordance with CRJ 900 Aircraft Maintenance Manual (AMM) 32-11-400-802 pertaining to the aircraft serial number; this task called for the task to install breaks; which were followed In Accordance With (IAW) CRJ 900 AMM 32-43-26-400-80. This task then called for the bleeding of the brake system IAW CRJ 900 AMM 32-43-00-870-801; the task proceeded to lead to an ops and leak check of the brake unit IWA CRJ 900 AMM 32-43-00-710-801 during this task no leaks were found at the time; therefore ops and leak check was good at the time.With the lack of experience I have with this system I am unsure of the exact cause of the issue; I cannot see what I could have done differently. I followed my task to an exact measurement as I am told to always do as such.
At the end of the night I had taxied the aircraft over the gate. I parked it and walked away from the aircraft without knowing that there was a leak on #1 brake that had happen when I taxied it in. Later I got a call from Maintenance Control saying that a pilot got hit in the face with skydrol. My other lead ran off to the gate to help the pilot and I taxied the other aircraft to the gate.The leaking brake and the fact that I did not know about until it was too late.
A Bombardier CRJ-900 Maintenance crew and a First Officer reported a hydraulic leak at the main landing gear. The First Officer reported of a burning sensation in his eyes.