B737 NG flight crew reported loss of First Officer's attitude and heading information with an IRS Master Caution light illuminated. The flight crew continued the takeoff and climbed to a safe altitude to troubleshoot. The flight crew elected to divert to a maintenance facility and the flight was cancelled.
Synopsis
B737 NG flight crew reported loss of First Officer's attitude and heading information with an IRS Master Caution light illuminated. The flight crew continued the takeoff and climbed to a safe altitude to troubleshoot. The flight crew elected to divert to a maintenance facility and the flight was cancelled.
Narrative
On takeoff in ZZZ we received an IRS Master Caution light at approximately 110 kts. The takeoff was continued. The First Officer lost his attitude and heading information on his PFD. The SID and departure clearance were complied with. Upon reaching a safe altitude we ran the IRS Fault QRH 2.110.9 FM. Dispatch and Maintenance Control were consulted on the ramifications of the fault and the loss of associated systems. Because of the IRS fault we were not able to re-establish function of the Autopilot. Without the Autopilot; RVSM airspace operations were not available; nor could they be accommodated by relevant ARTCC sectors. Our flight could not be completed to ZZZ1 in non-RVSM airspace with the fuel onboard; in consideration of the weather and airspace congestion to be anticipated in ZZZ1. A diversion to ZZZ2 was completed in consideration of the maintenance facilities; aircraft availability; and passenger services available. A plan of action on arrival was made; two hours prior to landing with Dispatch and Maintenance Control for the completion of the flight to ZZZ1. Thereafter the lead Flight Attendant and I made relevant announcements and query requests from passengers. Maintenance was able to swap out the faulty IRS; but not in time before impacting weather began to severely impact the ZZZ1 operation so a decision to swap aircraft was initiated. The original plan of action to complete the flight to ZZZ1 was not completed due to misinformed Customer Service Agents.
Second reporter narrative
On takeoff roll in ZZZ we received an IRS Master Caution light at approximately 110 kts. The takeoff was continued. The First Officer lost his attitude and heading information on his PFD. The SID and departure clearance were complied with by the Pilot Flying who had all normal indications. Upon reaching a safe altitude we ran the IRS Fault QRH 2.110.9 FM. Dispatch and Maintenance Control were consulted on the ramifications of the fault and the loss of associated systems. Because of the IRS fault we were not able to re-establish function of the Autopilot. Without the Autopilot; RVSM airspace operations were not available; nor could they be accommodated by needed ARTCC sectors. Our flight could not be completed in non-RVSM airspace with the fuel onboard; in consideration of the weather and airspace congestion to be anticipated in ZZZ1. A diversion to ZZZ2 was completed in consideration of the maintenance facilities; aircraft availability; and passenger services available. A plan of action was made two hours prior to landing with Dispatch and Maintenance Controll for the completion of the flight to ZZZ1. Thereafter the lead flight attendant and Captain made relevant announcements and answered requests from passengers. Maintenance was able to swap out the faulty IRS; but not in time before bad weather began to severely impact the ZZZ1 operation so a decision to swap aircraft was initiated.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.