B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 156; Flight Crew Type 777
Aircraft Equipment Problem Less Severe
Flight Crew Diverted; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
On departure Master Caution illuminated with associated right IRU 'Fault' and 'Align' light on overhead panel after running proper QRH the decision was made to divert to [a nearby airport]. An overweight landing of +900 to 1000 LBS was accomplished. Required write ups were entered and inspection completed. Flight continued after inspection and IRU replacement.
B737 Captain reported diverting to an alternate airport after receiving IRU 'Fault' and 'Align' caution lights in flight.