ADS-79D-HDBK Downloaded from https://www.everyspec.com Effective Task: A task that reduces the probability or consequences of failure to an acceptable level and is feasible to perform. (SAE JA1011) Environmental Consequences: A classification assigned to failure modes, or multiple failures in the case of hidden failure modes, that could result in a breach of any industry or government environmental standard or regulation. (SAE JA1011) Evident Failure: A failure mode whose effects become apparent to the operator(s) under normal circumstances if the failure mode occurs on its own. (SAE JA1011) Evident Function:
A function whose failure on its own becomes apparent to the operator(s) under normal circumstances. (SAE JA1011) Failure Consequences: A classification of the failure effects of failure modes into categories based on evidence of failure, impact on safety, the environment, operational capability, and cost. (SAE JA1011) Failure Effect: What happens when a failure mode occurs. (SAE JA1011) Failure-Finding Task: A scheduled task used to determine whether a specific hidden failure has occurred. (SAE JA1011) Failure Management Policy: A generic term that encompasses on-condition tasks, scheduled restoration, scheduled discard, failure-finding, run-to-failure, and one-time changes.
(SAE JA1011) Failure Mode: A single event, which causes a functional failure. (SAE JA1011) Function: What the owner or user of a physical asset or system wants it to do. (SAE JA1011) Functional Failure: A state in which a physical asset or system is unable to perform a specific function to a desired level of performance. (SAE JA1011) Hidden Failure: A failure mode whose effects do not become evident to the operator(s) under normal circumstances if the failure mode occurs on its own. (SAE JA1011) Hidden Function: A function whose failure on its own does not become evident to the operator(s) under normal circumstances. (SAE JA1011) Independent Verification Means:
An independent process to verify the correct functionality of a HUMS application on a ground station that utilizes COTS. The intent of independent verification is to gain some degree of confidence in the COTS operational reliability. Note: This process may be discontinued when sufficient confidence in the application has been achieved. (AC 29-2C) 186