Who can conduct a Group 1 In-Flight Functional Check?

• A. Line Check Airmen
• B. Any Crew
• C. Flight Engineers
• D. Ground Crew

Answer: (B)

Group 1 In-Flight Functional Check is an in-flight verification step used after maintenance to confirm a system operates correctly under flight conditions. The person performing it isn’t restricted to a single job title; any crew member who has received the required training and is authorized to perform the check can conduct it. This emphasis on training and authorization means pilots or other trained crew members can carry out the check as needed, rather than it being limited to a specific role. Ground crew or flight engineers aren’t the default performers for this in-flight test, and line check airmen have their own specialized duties separate from this check. The key idea is that competency and authorization, not the exact job label, determine who can perform the Group 1 In-Flight Functional Check.