Specially trained and certified mechanics Alex and Zach performing an in-frame engine rebuild on Ladder 204. The guys are performing this major repair on a 2008 Detroit Series 60 engine. This is just one of the major repairs fire maintenance can provide for our department to keep our crews and the public safe and us in a state of readiness. #mechanic #mechanics #firetruck #arizonafirefighters #asafeeastvalley #engine #gearheads #fireapparatus #emergencyvehicles #mesa #stateofreadiness #maintenance #certifiedmechanic #enginerepair #piercetrucks #detroitdiesel #majorrepair