If multiple contaminants require different flap settings, what note may appear on the WDR?

• A. ATTN MULTI FLAP
• B. FLAP VARIATION
• C. DUAL FLAP SETTING
• D. MULTI-FLAP NOT USED

Answer: (A)

When more than one contaminant requires different flap settings, there isn’t a single flap position that covers all conditions. The WDR will flag this with a note to draw attention to the fact that multiple flap settings may be needed, so crews and maintainers verify the correct setting for each contaminant. The note that appears is ATTN MULTI FLAP because it directly communicates that multiple flap configurations are involved and requires attention. It’s clearer and more explicit than a generic “flap variation,” and more precise than “dual flap setting,” which implies only two fixed settings rather than a broader multi-condition alert. It also correctly contrasts with a note that would indicate the multi-flap system isn’t used, which isn’t relevant when multiple settings are indeed required.