operations, unless required to be selected OFF for procedural
reasons. See Section 05-13-50, Stall Barrier Malfunction for
additional information.
B. Synopsis of Stall Warning / Stall Barrier System Differences for JAA
Certified Airplanes:
(1) Stall Warning System Operational Logic:
The stall warning system operational logic has been modified to
allow the system to continue to operate until Angle of Attack (AOA)
is reduced below the initiation threshold.
(2) Stick Shaker System Inhibition Logic:
The stick shaker system has been modified to no longer be inhibited
during control stick push.
(3) Stick Pusher System Inhibition Logic:
The stick pusher system has been modified to no longer be inhibited
when the autopilot disconnect switch is held in the ″IN″ position.
(4) Stick Pusher System Activation Logic:
The stick pusher system has been modified to not activate until both
AOA vanes are at or above the push AOA.
(5) Stick Shaker / Stick Pusher Threshold Ratio:
• [00b7] The AOA stick shaker/stick pusher threshold ratio
has been modified to 0.9 when the Weight-On-Wheels
(WOW) system is in the GROUND mode and for the first six
(6) seconds after transition to the AIR mode
• [00b7] For all other phases of flight, the AOA stick shaker/
stick pusher threshold ratio will equal 0.85
(6) Stall Barrier Disconnect (BARR DISC) Buttons:
The control yokes have been modified removing the BARR DISC
legend from the autopilot disconnect button.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-27-00
Page 65
August 14/03
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