Subtask 10.1.9 Operate Flight Controls/Stall Protection Systems Flashcards
All primary flight controls except for the ailerons are controlled by what?
Fly-by-wire
Briefly explain the signal path for a pitch change from control column to elevator in direct and normal.
In normal mode, the signal path goes through the FCM, of which, provides software based airspeed gain schedules and control limits to the P-ACE (primary actuator control electronics).
What is the purpose of the E-PBIT? What initiates the E-PBIT to run? How long does it take? What interrupts it?
The purpose of the E-PBIT is to test out-of-tolerance condition and failures in the FCM, P-ACEs and SF-ACEs. The E-PBIT test is initiated by applying AC power. It takes 3 minutes to run. The test is interrupted if any of the following (3) conditions exist; any hydraulic system is energized, any flight control module is depressed, and/or an interruption of AC power.
What is the purpose of the H-PBIT? What initiates the H-PBIT to run? How long does it take? What interrupts it?
The purpose of the H-PBIT is to provide a function test of the flight control actuators. The test is initiated by cycling the hydraulic systems in order of 3A, 1, 2. It takes approximately 60s to run. It is interrupted if any flight control is moved.
What (3) three conditions would cause a SPDBRK LEVER DISAGREE message?
Flaps set to greater than 1, 180 kts or less, thrust lever greater than 70%
Speed brakes are (???) activated and (???) actuated.
Electrically activated, hydraulically actuated
What is the difference between ground spoilers and multifunction spoilers?
Ground spoilers will only activate on the ground.
What are the functions of the multifunction spoilers?
(3) different functions – (#1)roll spoilers(in-flight), (#2) speed brakes (in-flight), and (#3) ground spoilers (on ground).
Under what (3) scenarios will the speed brakes automatically retract in flight?
Flaps set to greater than 1, 180 kts or less, thrust lever greater than 70%
After landing, when will the spoiler panels rise? When will they retract? How about in direct mode?
Spoiler extend when SIMULTANEOUSLY…
- Weight on wheels
- wheel speed is above 45 kts or airspeed above 60 kts
-TLA below 26 degrees
Spoiler retracts when;
-Wheel speed is below 45 kts for atleast (5) five seconds
OR
-throttles are moved beyond 35 degrees TLA after landing.
In direct mode, ground spoilers are not available.
What is the hierarchy of elevator trim priority?
(1) Backupswitches
(2) LH pitch trim switch (Captain)
(3) RH pitch trim switch (First Officer)
(4) FCM(auto-trim)commands
Which flight controls are considered primary? Secondary?
Primary
• Ailerons and multifunction roll spoilers
• Elevator
• Rudder
Secondary
•Horizontal stabilizer
• Flaps and slats
• The multi-function spoiler (when used as speed brakes and/ground spoilers)
• Dedicated ground spoilers
What purpose does the FCM serve?
Provides software-based assistance to the P-ACE and is required for normal-mode operation of the flight control system.
When I make an elevator or rudder movement, what path does that signal take in normal mode? Direct?
In normal mode, the signal path goes through the FCM, of which, provides software based airspeed gain schedules and control limits to the P-ACE (primary actuator control electronics).
In direct mode, the FCM is removed from the control loop and the control limits default to values set by hardware in the P-ACE.
What is a “higher-level function”? What purpose would one serve? Where in the aircraft are they?
(1) Elevator thrust compensation function
(2) Multi-function spoiler operation mode
(3) AOA limiting -stall protect activation
(4) rudder control system mode
(5) yaw damper
