Your response indicates that you have a good grasp of your AI initiative at a local (departmental) level.
The question remains to ensure that the principles you have chosen are fully aligned with a good ethical position. This can be done through a "checklist-like" approach, which should be contrasted with your implementation plan.
The context in which your organisation operates and your organisation's own features also play an important part in shaping this plan.
The checklist in a fuller Ethical Impact Assessment includes at least legal compliance, safety/security, fairness, transparency, contestability and governance, and each would have a number of subsets to provide more details.
We suggest that your initiative's implementation follows good project and risk management practices. For instance, the documentation of the risks linked to your initiative(s) can be used to steer your development plans, in effect using the concept of risk as a driver for improvement. At this ethical position level, it is also critical to ensure that your initiative's risk management is inscribed into your wider organisation's risk management. If it is not, we can recommend ways to do so, and make your corporate layer(s) more aware about your initiative's potential outcomes
A fuller assessment would provide you with key aspects to bolster your ethical position, and provide clear plans regarding implementation, risk management, and communication linked to your initiative.