maneuver took place at 15:07 UTC with the module engines' burn for 17.23 seconds giving an impulse of 1 m/s. The second burn for 250.04 seconds took place at 17:19 UTC with an impulse of 14.59 m/s. By then, the telemetry confirmed the propulsion system's operability. Additional burns for further orbit correction were scheduled for 23 July 2021. On 23 July, Nauka conducted the third and fourth burn in its approach. Because of the burn duration and Naukas location in orbit two more burns seemed needed to get it back into plane. Because of this the undocking of Pirs was pushed back by 12 hours with the new undocking time scheduled for 25 July. By mid-day 24 July 2021, the issues with Nauka propulsion had further postponed the schedule for undocking Pirs by another day, to 26 July. On 26 July at 10:55 UTC, Pirs undocked from the ISS for the last time. Roscosmos sent the deorbit command and Pirs entered the atmosphere over the Pacific Ocean at 14:01 UTC in a 17-minute burn. Self-destruct came at 15:04 UTC and Pirs and the trash that was inside it burned up as it entered the atmosphere over the Pacific, the first ISS module to be decommissioned and destroyed. Hours after undocking, Canadarm2 grappled Zarya and performed an inspection of Zvezda. No debris was detected and the latches were safely retracted. No additional spacewalk was needed and the space station was ready to receive Nauka on 29 July 2021. On 27 July 2021, specialists of the Nauka flight control group at the Mission Control Center carried out a routine corrective maneuver for the module. The final orbit correction to put Nauka on a rendezvous path with ISS was performed on 28 July at 16:43:07 UTC with a single firing of the main engines. On 29 July 2021, Nauka successfully automatically docked and was attached to the station at 13:29 UTC, and was put to work on the station by the crew. Post-docking activities Thruster glitches after docking A few hours after docking while the crew were performing leak checks in preparation for hatch opening, Nauka's onboard computers experienced a software glitch, due to which an erroneous direct command fired onboard thrusters, causing the ISS to rotate out of orientation unexpectedly. NASA and Roscosmos ground controllers worked to remotely fix the glitch issue, while at the same time instructing the crew to close