B737-900
Communication Breakdown; Training / Qualification; Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance
General None Reported / Taken
Aircraft; Human Factors; Incorrect / Not Installed / Unavailable Part
While working midnight shift;I was assigned to work a tail lube task card. Upon completion of the tail lube task card I was approached by the Lead Technician and asked if I could assist another technician in replacing #2 MLG (Main Landing Gear) Tire. Prior to me beginning the task; a tire had been brought out to the aircraft. I gathered the required tooling and AMM (Airplane Maintenance Manual) Reference and removed and replaced the #2 MLG Wheel/Tire Assembly with another technician. While the other technician returned tooling; I filled out the paperwork and cleared the log page. Being [that] the new tire/wheel assembly was at the aircraft; I mistakenly assumed the correct tire/wheel assembly had been brought out.
Maintenance Technician installed incorrect tire on 737-900 aircraft.