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The following is a summary of the informat … The following is a summary of the information provided by Engine Systems, Inc. (ESI) via fax:</br>An edge or lip in the bore of an EMD (Brand name: Electro-Motive Diesel) cylinder liner prevented successful installation of the corresponding power assembly on an emergency diesel generator set. The lip is located axially at the bottom of the inlet ports and is present around the circumference of the bore. The EMD model 645E4 is a 2-stroke engine with air inlet ports in the wall of the cylinder liner. As the piston travels below the inlet ports, air box pressure scavenges and replenishes air to the power assembly.</br>Installation of the power assembly requires lowering the piston through the liner in order to secure the connecting rod to the crankshaft. During this process the piston could not be lowered below the inlet ports due to the piston rings catching on the lip. The power assembly was not installed and therefore there was no safety hazard; however, if the defect had gone undetected there was the potential to damage engine components and possibly reduce load carrying capacity of the engine.</br>The extent of the condition is this single cylinder liner, P/N 9318833, S/N 20M0938 used in the power assembly at Tennessee Valley Authority (TVA) - Sequoyah Nuclear Plant, Serial Number: 23H1306.</br>Corrective Actions:</br>For TVA-Sequoyah:</br>No action required; the power assembly has been returned to ESI.</br>For ESI:</br>To prevent reoccurrence, ESI has revised the dedication package to include verification that bore machining is continuous along the entire length and no edges or lips are present. The revision was implemented on December 6, 2023.</br>* * * UPDATE ON 1/17/24 AT 1515 EST FROM DAN ROBERTS TO ADAM KOZIOL * * *</br>Engine Systems, Inc. sent a revision to change the date of defect identification to November 27, 2023.</br>Notified R2DO (Miller), Part 21 Group (email)ified R2DO (Miller), Part 21 Group (email) +
05:00:00, 27 November 2023 +
56,913 +
16:00:00, 4 January 2024 +
05:00:00, 27 November 2023 +
The following is a summary of the informat … The following is a summary of the information provided by Engine Systems, Inc. (ESI) via fax:</br>An edge or lip in the bore of an EMD (Brand name: Electro-Motive Diesel) cylinder liner prevented successful installation of the corresponding power assembly on an emergency diesel generator set. The lip is located axially at the bottom of the inlet ports and is present around the circumference of the bore. The EMD model 645E4 is a 2-stroke engine with air inlet ports in the wall of the cylinder liner. As the piston travels below the inlet ports, air box pressure scavenges and replenishes air to the power assembly.</br>Installation of the power assembly requires lowering the piston through the liner in order to secure the connecting rod to the crankshaft. During this process the piston could not be lowered below the inlet ports due to the piston rings catching on the lip. The power assembly was not installed and therefore there was no safety hazard; however, if the defect had gone undetected there was the potential to damage engine components and possibly reduce load carrying capacity of the engine.</br>The extent of the condition is this single cylinder liner, P/N 9318833, S/N 20M0938 used in the power assembly at Tennessee Valley Authority (TVA) - Sequoyah Nuclear Plant, Serial Number: 23H1306.</br>Corrective Actions:</br>For TVA-Sequoyah:</br>No action required; the power assembly has been returned to ESI.</br>For ESI:</br>To prevent reoccurrence, ESI has revised the dedication package to include verification that bore machining is continuous along the entire length and no edges or lips are present. The revision was implemented on December 6, 2023.</br>* * * UPDATE ON 1/17/24 AT 1515 EST FROM DAN ROBERTS TO ADAM KOZIOL * * *</br>Engine Systems, Inc. sent a revision to change the date of defect identification to November 27, 2023.</br>Notified R2DO (Miller), Part 21 Group (email)ified R2DO (Miller), Part 21 Group (email) +
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