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AO 50-220/74-3:on 740402,both inside MSIVs failed to meet required limit of 12.9 std cubic ft per inch.Caused by drift in position switch on valve controller.Valves will be repaired & retested.

Accession Number: ML20090E186

Date Released: Monday, April 13, 2020

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• ML20090E184 - AO 50-220/74-3:on 740402,both inside MSIVs failed to meet required limit of 12.9 std cubic ft per inch.Caused by drift in position switch on valve controller.Valves will be repaired & retested. (2 page(s), 4/9/1974)
• ML20090E187 - AO 50-220/74-3:on 740402,during leak testing,both inside MSIVs exceeded leakage limit.Caused by either drifting position switch or improper seating of disc.Investigation continuing.Position switch will be readjusted. (1 page(s), 4/2/1974)