The Naval Air Warfare Center intends to award a sole-source, fixed-price contract to Donaldson Company Inc. for the purchase of Engine Air Particle Protection Systems (EAPPS) Test Sets to support the CH-53K Program. The contract is for a base quantity of three test sets, with optional quantities of two for FMS support and two for domestic support. The justification for the sole-source award is that Donaldson is the sole manufacturer of this equipment, which is exclusively used on the CH-53K helicopter, and the government lacks the technical data to permit competition. The performance location is not specified in the provided description. Budget information is not specified.