Your question is Relying on Technical Expertise. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're leading a technical initiative and realize an important part of the work depends on expertise you don't personally have. You still need to keep the project moving, make sound decisions, and maintain credibility with stakeholders without pretending to know more than you do.
Describe a situation where you had to rely on a team member's expertise because you lacked the technical knowledge.