Narrative:

Early evening; september 2013; at our ZZZ company X maintenance hangar; I was assigned to a main landing gear (medium large transport) change on a crj-200 aircraft. I installed the two hydraulic brake swivel lines incorrectly. When the aircraft landed in ZZZ1 two days later; both outboard (O/B) tires had blown because the antiskid was not reading right [correctly] and caused the brakes to lock-up. I failed to correctly read my aircraft maintenance manual (amm) reference to ensure that I fully complied with amm 32-11-20. The swivel [coupling] easily fit into position; so I did not think that it was being installed incorrectly. I incorrectly performed the operational check of the anti-skid brake test system. The hydraulic lines had been installed opposite from what they should have been. The lines were operating the wrong brakes which caused them to lock-up. The crj-200 was immediately taken out of service when it landed in ZZZ1. Recommend a couple things that I could have done to prevent this incident are: 1)-always look at and read my reference to whatever my task pertains to 2)-never assume anything. Always ensure that if I install something or remove something; to be sure that I did it correctly and within limits of the manuals.3)-double check my work. Get someone else if they have the time to look at my work so I can have a second opinion; then go back and triple check my work to be absolutely sure!complacency and time pressures [were contributors]. Aircraft damage [occurred].

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Original NASA ASRS Text

Title: An Aircraft Maintenance Technician (AMT) was informed that a CRJ-200 aircraft had blown all four Main Landing Gear (MLG) tires on landing. He had inadvertently cross-connected the Number 2 and Number 3 Hydraulic System brake lines at the MLG Swivel Coupling Assembly during a MLG change. The Anti-Skid Brake Test was also performed incorrectly.

Narrative: Early evening; September 2013; at our ZZZ Company X Maintenance Hangar; I was assigned to a Main Landing Gear (MLG) change on a CRJ-200 aircraft. I installed the two hydraulic brake swivel lines incorrectly. When the aircraft landed in ZZZ1 two days later; both Outboard (O/B) Tires had blown because the Antiskid was not reading right [correctly] and caused the brakes to lock-up. I failed to correctly read my Aircraft Maintenance Manual (AMM) reference to ensure that I fully complied with AMM 32-11-20. The swivel [coupling] easily fit into position; so I did not think that it was being installed incorrectly. I incorrectly performed the Operational Check of the Anti-Skid Brake Test System. The hydraulic lines had been installed opposite from what they should have been. The lines were operating the wrong brakes which caused them to lock-up. The CRJ-200 was immediately taken out of service when it landed in ZZZ1. Recommend a couple things that I could have done to prevent this incident are: 1)-Always look at and read my reference to whatever my task pertains to 2)-Never Assume anything. Always ensure that if I install something or remove something; to be sure that I did it correctly and within limits of the Manuals.3)-Double check my work. Get someone else if they have the time to look at my work so I can have a second opinion; then go back and triple check my work to be absolutely sure!Complacency and time pressures [were contributors]. Aircraft damage [occurred].

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.