The following information was provided by Fairbanks Morse (FM) via email:
Facilities affected:
FM Sales Order Item Affected Facility Serial Number
40135890 12996949 Farley 22436624
40132483 12996949 Limerick 22444358
40130845 12996949 Limerick 22444359
40130158 12996949 Hope Creek 22277182
Basic component which fails to comply or contains a defect: Emergency Diesel Generator Electronic Speed Control Module, Woodward 2301A
Nature of defect: In some 2301A controls, 1 nF capacitors may have been loaded in place of 150 pF capacitors. This could affect circuitry controlling the units' crystal, speed signal and reset dynamics, and power supply operation.
Safety hazard which could be created by such defect: This issue can prevent affected 2301A controls from starting up or may lead to unscheduled shutdown of affected controls. It can also prevent the prime mover from obtaining a stable speed response, causing it to hunt or overspeed. In some cases, the RESET potentiometer may run out of range to adjust the unit for stable operation or desired prime mover speed response, resulting in prime mover performance outside of specification limits.
Fairbanks Morse Engine will notify affected licensees no later than 3 Nov 2022, and repair returned affected units. Additional corrective actions will be documented in the Fairbanks Morse corrective system under PD-1102.
Any installed affected Speed Control should be removed from service as soon as practical and returned to Fairbanks Morse for repair. If affected controller is installed and licensee experiences unstable speed response, the electronic speed control should be turned off and the emergency diesel generator should be allowed to operate using the mechanical governor system.
POC: Martin Kurr, Quality Assurance Manager (608) 364-8247