When 1 or more of the FD functions have disengaged, the __ __ __ caution will appear

When 1 or more of the FD functions have disengaged, the __ __ __ caution will appear

• A. FLIGHT DIR FAIL
• B. FD DISABLE
• C. DIR FAULT
• D. FD FAIL

Answer: (A)

When the Flight Director system loses one or more of its functions, a specific caution is shown to alert the pilot that the guidance cues are no longer reliable. That alert is labeled with the full phrase “FLIGHT DIR FAIL,” which communicates clearly that the Flight Director has failed rather than simply being disabled or indicating a fault in a separate instrument. Why this phrasing is best: it directly identifies the source of the issue (the Flight Director) and states that the function has failed, not just that it’s been turned off or that a different component is at fault. The other options don’t match the standard warning wording: “FD DISABLE” would imply intentional deactivation, which isn’t the generic disengagement scenario; “DIR FAULT” would point to a fault in the directional guidance instrument rather than the Flight Director system as a whole; and “FD FAIL” is not the official cockpit wording used for this condition.

When the Flight Director system loses one or more of its functions, a specific caution is shown to alert the pilot that the guidance cues are no longer reliable. That alert is labeled with the full phrase “FLIGHT DIR FAIL,” which communicates clearly that the Flight Director has failed rather than simply being disabled or indicating a fault in a separate instrument.

Why this phrasing is best: it directly identifies the source of the issue (the Flight Director) and states that the function has failed, not just that it’s been turned off or that a different component is at fault. The other options don’t match the standard warning wording: “FD DISABLE” would imply intentional deactivation, which isn’t the generic disengagement scenario; “DIR FAULT” would point to a fault in the directional guidance instrument rather than the Flight Director system as a whole; and “FD FAIL” is not the official cockpit wording used for this condition.