If a fluid sample fails testing, what is the appropriate action for the fluid and dispensing equipment?

When a fluid sample fails testing, the appropriate action is to quarantine the fluid and dispensing equipment. This step is crucial because quarantining isolates any potentially contaminated or defective materials from further use, preventing any risk to aircraft safety or performance.

By keeping the fluid and equipment in quarantine, it ensures that they cannot be inadvertently used until further assessment is made. This action allows for thorough investigation, possible retesting, or a decision to discard the material if it is determined to be unsuitable.

Other options, such as immediate disposal or continuing to use the fluid with caution, do not provide adequate safety measures. Immediate disposal might lead to unnecessary waste if the fluid could be salvaged or tested further, while continuing use without addressing the issue poses safety risks. Testing again after a week may not be sufficient to ensure quality and safety; addressing the underlying problem should be prioritized. Thus, quarantining is the most responsible and safety-conscious action.