B737 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 151.42; Flight Crew Total 1432.42; Flight Crew Type 1432.42
Human-Machine Interface
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural FAR
General Maintenance Action
Aircraft; Human Factors; Incorrect / Not Installed / Unavailable Part; Procedure
Just wanted to submit an informational report for other 737 pilots to be aware of. We arrived at the aircraft and I began my exterior inspection. When I got to the left main gear I found two different tires installed on the gear. One tire was the square shouldered max tire while the other was the rounded shoulder tire you see on the regular 737s. We contacted Maintenance and they confirmed that the tires are not interchangeable; which is what we figured since they have different max tire speeds and size/shape. An ELB entry was made and maintenance installed the correct tire. Rest of flight continued normally.
B737 First Officer reported discovering the wrong main tire and wheel assembly installed on their aircraft during pre-flight walk around. It was reported to Maintenance who replaced the tire with the correct NG tire.