The following is a synopsis of information received via E-mail:
Fisher Information Notice (FIN) 2015-01 was published 3/18/2015 regarding Fisher Type 461 valve plug machining. FIN 2015-01 details an issue in which a valve plug was returned to Fisher after the customer discovered a machining error was present in the plug. This Type 461 valve plug is intended to have a groove machined across the seating surface to provide a controlled leak rate through the valve when the plug is on the seat. It has been determined that the corrective action implemented in association with FIN 2015-01 was insufficient to ensure accurate machining and to prevent reoccurrence of this issue.
This Part 21 Notification (issued as
FIN 2017-05) applies to Type 461 Plugs sold or reworked since the publication date of
FIN 2015-01. Specifically this notification applies to assembly item number 25A0413X162 that Fisher Controls International
LLC (Fisher) supplied to
Florida Power and Light (
FPL) St. Lucie per
FPL Order 2363439 (Fisher Order Number 025-X204270) and to item number 29A7841X052 that Fisher supplied to Entergy Waterford 3 per Entergy Order 10297987 (Fisher Order Number
026N-187174).