ADS-79D-HDBK Downloaded from https://www.everyspec.com Sub-Section 6: The next steps in the Maintenance Credit V&V process are depicted in the flow chart above. The approval of the V&V plan is the entry criteria for the V&V activities. This part of the process begins with the verification of the credit methodology. Upon completion of the verification steps, determine whether the verification criteria outlined in the plan have been met. If no, then the system element, i.e. the algorithm and corresponding configuration, needs to be redesigned and re- verified. If yes, move onto the next step in the Maintenance Credit process – generation of production unit.
It is to be noted that at this point the Air- Worthiness Report (AWR) has not yet been written for the credit methodology. The next step in the process is validation of the credit methodology. A point to be highlighted here is that validation can only be conducted using the verified production unit. Similar to the verification completion part of the process, it needs to be determined whether the validation criteria outlined in the V&V plan have been met. If no, then the system element, i.e. the algorithm and corresponding configuration needs to be redesigned, re-verified and re- validated.
If the validation was successful, then an AWR for the methodology can be written and the unit can be officially introduced into production. For Continued Airworthiness (CA), the credit methodology will have to follow the Maintenance Credit process, starting at verification. To conclude this process, an official document or a series of interlinked documents need to be created that detail the Verification and Validation process. K.5.1 Mechanical Health Credit V&V Process. Mechanical health of a helicopter can be based on Condition Indicators (CI), or rolled-up Health Indicators (HI).
Both the aforementioned methods are similar in nature as they provide an instantaneous look at the health of the aircraft. It is to be noted that in order for the system to get this type of Maintenance Credit, the candidate system must have previously been installed on the aircraft. It also must have collected data for this aircraft. This section will provide a detailed view of the processes of Verification and Validation, two of the steps in the Maintenance Credit Process (as seen in the 201