A new 2.2 MW subsea multiphase pump was installed and commissioned in LLOG’s Who Dat “E” field in January 2020. Within 30 days of startup the pump exhibited a failure which rendered it inoperable for continued service. The pump was subsequently retrieved, disassembled, and analyzed to identify the root cause of failure. The remediation plan currently in progress is the manufacture of a new pump cartridge that will be re-installed in 3Q2022. The presentation will touch on the original project execution and design basis, operating conditions, and diagnostics at time of failure, root cause analysis of pump failure, and the corrective actions and remediation plan going forward.