Narrative:

Everything appeared normal with checklist and pushback from gate. Once pushback was completed; we got a scratchpad message on the FMC stating IRS motion. The first officer and I both looked up at the overhead center panel at the IRS switches and noticed they were both in align. The first officer apologized and placed them in navigation. I cleared the scratchpad message and took a look at our pfd's and the FMC and thought everything looked normal and elected to continue. As we were taxiing out to runway xxl; we got the IRS motion message again on the FMC scratchpad. I looked over our pfd's and FMC legs page and once again everything looked normal; so I cleared the FMC scratchpad message and elected to continue. We were cleared for takeoff and I was the pilot monitoring; at this point everything looked normal on our displays. I'm not exactly sure of the exact airspeed; however; what we believed to be past 80 knots [was when] we got the master caution IRS light. I cleared the master caution IRS light and said to continue. Once we became airborne; we noticed all navigation and attitude information on both sets of pfd's were inoperative. All we had was the backup ADI and the whiskey compass above the center window. At that point I informed ZZZ tower that we needed a no gyro PAR back to ZZZ. I told them that we had lost our attitude and navigation instrumentation and needed a no gyro PAR back to the airport. They brought us around north of the airport where the weather was more cooperative and we were able to obtain the airport visually. ATC asked while on final if we were declaring an emergency and I said 'no'. ATC asked us if we needed the fire trucks to follow us down the runway and I said that I didn't think we needed that with the issue we had. After landing on runway xxr; we taxied to gate at ZZZ and were met by the fire department; company maintenance; and company operations.

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Original NASA ASRS Text

Title: B737 flight crew reported the loss of all navigation and attitude information after takeoff.

Narrative: Everything appeared normal with checklist and pushback from gate. Once pushback was completed; we got a scratchpad message on the FMC stating IRS MOTION. The First Officer and I both looked up at the overhead center panel at the IRS switches and noticed they were both in ALIGN. The First Officer apologized and placed them in NAV. I cleared the scratchpad message and took a look at our PFD's and the FMC and thought everything looked normal and elected to continue. As we were taxiing out to Runway XXL; we got the IRS MOTION message again on the FMC scratchpad. I looked over our PFD's and FMC LEGS page and once again everything looked normal; so I cleared the FMC scratchpad message and elected to continue. We were cleared for takeoff and I was the Pilot Monitoring; at this point everything looked normal on our displays. I'm not exactly sure of the exact airspeed; however; what we believed to be past 80 knots [was when] we got the MASTER CAUTION IRS light. I cleared the MASTER CAUTION IRS light and said to continue. Once we became airborne; we noticed all navigation and attitude information on both sets of PFD's were inoperative. All we had was the backup ADI and the Whiskey Compass above the center window. At that point I informed ZZZ Tower that we needed a No Gyro PAR back to ZZZ. I told them that we had lost our attitude and navigation instrumentation and needed a No Gyro PAR back to the airport. They brought us around north of the airport where the weather was more cooperative and we were able to obtain the airport visually. ATC asked while on final if we were declaring an EMERGENCY and I said 'no'. ATC asked us if we needed the fire trucks to follow us down the runway and I said that I didn't think we needed that with the issue we had. After landing on Runway XXR; we taxied to gate at ZZZ and were met by the Fire Department; Company Maintenance; and Company Operations.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.