Each A/P can be engaged by pushing a separate CMD or CWS engage switch. A/P
engagement in CMD or CWS is inhibited unless all of following conditions are met:
• no force is being applied to the control wheel
• the STAB TRIM AUTOPILOT cutout switch must be in the NORMAL position.
• the inertial reference data from the ADIRU must be valid
• the IRS transfer switch must be in the NORMAL position to engage the autopilot.
Unless approach (APP) mode is engaged, only one A/P can be engaged at a given time.
Approach mode allows both A/Ps to be engaged at the same time. Dual A/P operation
provides control through landing flare and touchdown or an automatic go–around.
In single A/P operation, full automatic flare and touchdown capability and A/P
go–around capability are not available.
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