During an engine failure, the use of the FMS Speed Module is

During an engine failure, the use of the FMS Speed Module is

• A. Allowed
• B. Authorized
• C. Prohibited
• D. Required

Answer: (C)

During an engine failure, you must manual-control the airspeed because the automated speed guidance from the FMS assumes normal two-engine operation. The FMS Speed Module can select speeds that are unsafe or unattainable with one engine inoperative, potentially compromising climb performance and controllability. For this reason, its use is prohibited in engine-out situations; you rely on pilot-selected speeds and engine-out procedures instead. The other options imply the FMS speed guidance may be used or is required, which isn’t allowed here.

During an engine failure, you must manual-control the airspeed because the automated speed guidance from the FMS assumes normal two-engine operation. The FMS Speed Module can select speeds that are unsafe or unattainable with one engine inoperative, potentially compromising climb performance and controllability. For this reason, its use is prohibited in engine-out situations; you rely on pilot-selected speeds and engine-out procedures instead. The other options imply the FMS speed guidance may be used or is required, which isn’t allowed here.