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Trio Avionics Pro Pilot Operation Manual

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Pro Pilot
Operation Manual for Experimental
Aircraft
Trio Avionics Corporation
Version 5.0

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  • Page 1 Pro Pilot Operation Manual for Experimental Aircraft Trio Avionics Corporation Version 5.0...
  • Page 2 Notice: This manual uses illustrations that generally show the Pro Pilot model that mounts in a standard 3-1/8” round cutout in the instrument panel. However, all functions are duplicated in the stack mount version of the Pro Pilot. The instructions herein are valid for both systems with the following exceptions: ...

  • Page 3: Table Of Contents

    Table of Contents Pro Pilot Control Head Diagram ....................7 Chapter 1 Horizontal Navigation Overview (HNAV) ............... 8 GPS Requirements ..........................8 Operation ..............................8 Basic H NAV Operation Modes ....................... 8 Track Mode (TRK) ............................ 9 Course Mode (CRS)..........................9 Intercept Mode (INT) ..........................
  • Page 4 Setting Maximum Turn Rate ........................49 Setting LED Flash Rate ........................50 Zero Flt Data on Power Up ........................50 Custom Startup Display Screen ......................51 Chapter 11 Fuel Preferences Menu ..................52 Changing Fuel Levels ..........................52 Trio Avionics Pro Pilot Manual...
  • Page 5 Automatic Elevator Trim ........................77 Trim Motors ............................77 Auto-Trim Operation ..........................78 Manual Elevator Trim with Encoder Knob……………………………………………………………………78 Switching Between Manual Trim and Auto-Trim ................... 79 Chapter 14 Aspen / AV30 / Garmin G5 Integration………………..………...………………….80 AP CRS Enable…………………………………………………………………………………………………80 Trio Avionics Pro Pilot Manual...
  • Page 6 Chapter 15 Alerts, Warnings and Alarms ................86 Alerts ..............................86 Warnings ..............................86 Alarms ..............................86 Chapter 16 Wiring Diagrams ....................87 ARINC 429 WIRING ..........................88 Installation 1 ............................88 Installation 2 ............................88 Fuel Sensor Connections………………………………………………………………………………………89 Trio Avionics Pro Pilot Manual...

  • Page 7: Pro Pilot Control Head Diagram

    Pro Pilot Control Head Diagram H NAV Servo V NAV Servo On/Off H NAV Servo Switch V NAV Servo On/Off On/Off GPSS/GPSV LED’s Display Screen H MODE V MODE LEDs LEDs H MODE V MODE Pushbutton Pushbutton Rotary Encoder And Pushbutton...

  • Page 8: Chapter 1 Horizontal Navigation Overview (Hnav)

    Chapter 1 Horizontal Navigation Overview (HNAV) The H NAV function of the Pro Pilot controls the roll axis servo for attitude correction (wing leveling) and provides horizontal navigation using signals from a GPS receiver or EFIS system. GPS Requirements The Pro Pilot does not contain a built-in GPS or other navigation data source. It is necessary that an appropriate host GPS source be supplied and correctly connected to the Control and Display Head at the time of installation.

  • Page 9: Track Mode (Trk)

    Pilot commands CRS mode Autopilot intercepts original course Original GPS course line Hint: An alternative method of using the CRS mode is in conjunction with the Pilot Controlled Steering (PCS) mode of operation (see pages 30 & 31). Trio Avionics Pro Pilot Manual...

  • Page 10: Intercept Mode (Int)

    In the Intercept (INT) mode, the intercept angle to the original track may also be changed by rotating the encoder. The intercept angle will change in the direction that the encoder is rotated (as above). The Pro Pilot will automatically switch from the INT mode to the TRK mode as it closes on the intercept boundary.

  • Page 11: Chapter 2 Vertical Navigation Overview (Vnav)

    Vertical Navigation Overview (VNAV) The V NAV function of the Pro Pilot controls the pitch axis of the aircraft. It provides commands to the pitch servo that attaches to the elevator control system. The V NAV system uses a rate gyro, pressure sensors, airspeed sensors and accelerometers as primary references in controlling the pitch attitude of the aircraft.

  • Page 12: Vertical Climb/Descent

    Vertical Climb/Descent The Pro Pilot also allows the pilot to select a desired climb or descent rate (i.e. VS (vertical speed), in ft. per minute). Press the V MODE button again and: Set the desired climb or descent rate by rotating the encoder knob.

  • Page 13: Chapter 3 Control And Display Overview

    (CRS) is automatically selected (CRS LED illuminated). All servo power is initially off on power up and the Pro Pilot is disconnected from the aircraft control system. Trio Avionics Pro Pilot Manual...

  • Page 14: H Mode And V Mode Buttons

    HLD LED is illuminated when the altitude hold mode is active, or the VS mode is active and the vertical rate is set to zero. The ALT HOLD mode LED will flash to indicate that an executed fine altitude adjustment is in progress. Trio Avionics Pro Pilot Manual...

  • Page 15: Roll (H Nav) & Pitch (V Nav) Servo Activation

    LED is unlighted, the respective servo is inactive and that autopilot function is disconnected from the control system. When the LEDs are illuminated, the Pro Pilot is engaged and providing control signals to the Pitch and Roll servos. The roll servo is activated (or deactivated) by pressing the H NAV pushbutton momentarily.

  • Page 16: H Mode Encoder Functions

    Rotating the encoder quickly changes the course in larger increments. Rotating the encoder counterclockwise alters the commanded course to the left, while rotating the encoder clockwise alters commanded course to the right. (This is comparable to a traditional “Heading Bug” function). Trio Avionics Pro Pilot Manual...

  • Page 17: Mode Encoder Functions

    If the GPS data to the Pro Pilot is unavailable, as indicated by a NO GPS warning, the encoder knob switch provides a method to turn the airplane to a new heading or stabilize the aircraft in a straight and level attitude.
  • Page 18 It is also employed to set a desired climb/descent rate when on the VS SET screen, and it is used to select a destination altitude when it is on the ALT/ELEV SET screen. Setting the Altitude or Elevation The encoder is used to adjust the autopilot internal altimeter when required. Trio Avionics Pro Pilot Manual...

  • Page 19: Chapter 4 Preflight Power Up

    A preflight check on the Pro Pilot at this point would be to engage the servos by pressing the H NAV and VNAV pushbuttons momentarily and noting that the “H” LED and V LEDs illuminate. The servo is now controlling the ailerons and elevator.

  • Page 20: Chapter 5 Information Fields

    Power up Display When the Pro Pilot is powered on a logo display is present showing the firmware revision operating in the unit. (This can be field programmed to present a personalized screen at power on).

  • Page 21: Track Display Information

    The bearing to waypoint (BTW) field is located on the left side of the upper line as illustrated. This field is updated whenever the GPS data to the Pro Pilot is refreshed, normally once every one or two seconds, depending on the GPS interface data rate. (A GPS with NMEA data output generally updates once every one or two seconds, while an Aviation Data Link updates once every second).

  • Page 22: Other Available Fields On The Lower Line

    Estimated Time En Route, MM:SS (ETe) This field is identical to the ETE field except the format is MM:SS (minutes: seconds). This format is automatically displayed when the RNG/GS calculation indicates the next waypoint is less than 60 minutes away. Trio Avionics Pro Pilot Manual...

  • Page 23: Range To A Waypoint (Rng)

    GPS data stream is greater than 999 miles. Tracking functions are not affected by this condition. TRN? The TRN? warning is displayed in this field when the Pro Pilot detects a negative closing velocity (going away from the “TO” waypoint).

  • Page 24: Spd

    No pilot action is required. Tracking functions are disabled until the condition is cleared automatically, usually on the next GPS update. Wing leveling remains in operation. Trio Avionics Pro Pilot Manual...

  • Page 25: Chapter 6 Horizontal Operation

    (heading) the plane was traveling when the mode is entered. The Pro Pilot will turn the plane to keep the ground track (GTK) and the commanded course (CMD) the same value. Trio Avionics Pro Pilot Manual...

  • Page 26: Intercept A Course (Int)

    The automatic switch from the INT to TRK mode occurs at this distance to allow a smooth intercept. If the XTK is greater than the computed distance, then the INT mode can be entered. Trio Avionics Pro Pilot Manual...

  • Page 27: Selecting A Track Offset Position (Top)

    With the advent of highly accurate GPS navigation and coupled autopilots, aircraft are tracking more and more closely to the airway centerlines on designated airways (the Pro Pilot can easily hold the course centerline within 50 to 100 feet in smooth air). This creates the real possibility of overtaking or head-on encounters with other aircraft that are also tracking the airway centerline, especially during climb and descent when normal altitude separation is not in effect.

  • Page 28: Initiating The Recover Mode

    In the TRK mode (only) press and rotate the ROTARY ENCODER switch counterclockwise or clockwise to change the offset distance to 0.0, or by changing modes, or by simply cycling power to the Pro Pilot using the POWER switch. >...

  • Page 29: Variable Display Field - Top Line

    “----“(dashed lines) or may enter the NO FPLAN mode when the condition is detected. This is usually a condition that clears after another GPS sample or two is transmitted to the Pro Pilot. No pilot action is required. Normal TRK mode tracking computations are inhibited until the GPS data integrity is restored.

  • Page 30: Chapter 7 Horizontal Flight Examples

    In such case, after approximately 7 seconds without signal the Pro Pilot displays the NO GPS message. Since the Pro Pilot is no longer able to provide the navigation function, the ENCODER can be used to control the aircraft turn rate, or to correct for gyro drift to affect a straight-ahead flight path The Pro Pilot servo is still engaged so the aircraft is being controlled in the “wing leveler”...

  • Page 31: Course Mode Example

    (DTK). NOTE: If a “direct to” GOTO waypoint is selected the autopilot will automatically switch to the TRK mode since the crosstrack error will be zero. Trio Avionics Pro Pilot Manual...

  • Page 32: Intercept Mode Example

    Progressing toward the DTK, as the IDS value approaches 0.0 the Pro Pilot switches automatically from the INT mode to the TRK mode when the aircraft is 1.0 miles right of the DTK. The Pro Pilot now is turning the airplane back to the right slightly and the XTK is approaching 0.00. The Pro Pilot will now re- establish the airplane back on the DTK headed directly toward the programmed waypoint.
  • Page 33 When the PCS servo reconnect occurs the current GTK is snapshot as the commanded ground track (TRK or CRS entry) or intercept angle (INT entry). NOTE: The PCS function also works with the altitude control portion of the Pro Pilot. This is discussed in detail later in this manual.

  • Page 34: Chapter 8 Vertical Operation

    After adjusting the primary aircraft altimeter, the Pro Pilot may be slightly off altitude. If the required altitude correction is more than 30 or 40 feet, the pilot may simply rotate the encoder knob...

  • Page 35: Setting Vertical Speed (Set Vs)

    NOTE: In the PCS mode the vertical rate change must be at least 200 FPM or the Pro Pilot will enter ALT HLD upon releasing the PCS (remote disconnect) button. If the rate is greater than 200 fpm it will maintain the climb/descent (or airspeed) that it senses when the button is released.

  • Page 36: Altitude Pre-Select Function (Alt Sel)

    If the Pro Pilot is commanding a climb to an assigned altitude of 10,000 ft and a controller asks the pilot to temporarily hold at 6,000 ft., the pilot may press the encoder button upon reaching 6,000 ft and the aircraft will hold at that altitude.

  • Page 37: Entering The Current Altitude

    Pro Pilot also provides a means for making such adjustments. While the primary aircraft altimeter is adjusted using a scale calibrated in “inches of mercury” (e.g., 29.92), the Pro Pilot is adjusted to agree with the altitude shown, in feet, on the corrected primary altimeter. Barometer Elevation/Altitude Set...

  • Page 38: Pausing The Climb Example

    6,500 feet. At that point, the Pro Pilot will enter the ALT HLD mode and the green ALT HLD LED will illuminate to inform the pilot that the aircraft is holding at the current altitude. The AS/VS LED and the ALT SEL LED will extinguish.

  • Page 39: Changing The Destination Altitude

    ALTITUDE SET screen where the pilot can assure that the altitude shown agrees with the primary aircraft altimeter. Pressing the encoder again will initiate the climb). If a specific climb rate was not entered, the Pro Pilot will enter the default climb rate that was chosen in the PREFERENCES menu.
  • Page 40 ENCODER. Once pressed, VSP SUS will be displayed along with the 800 ft/min climb rate in the bottom field. The Pro Pilot is now properly set for the flight. The GPS has a flight plan and the climb rate and destination altitude have been entered.

  • Page 41: Vertical Use Of Pilot Command Steering

    It should also be noted that the PCS function (when employed) will affect the H NAV mode as well. As previously described, it will put the Pro Pilot into the CRS mode and track the course that the aircraft is on when the button is released.

  • Page 42: Chapter 9 Gpss And Gpsv Operation

    ARINC 429 data stream provided by IFR certified WAAS enabled GPS receivers. When ARINC signals are available and the Pro Pilot is in the Track (TRK) mode, the autopilot follows the roll commands (GPSS) and vertical commands (GPSV) issued by the originating GPS receiver or EFIS.

  • Page 43: Gpss Led Indicator

    GPSV data is available, but is not being used due to the autopilot not being in the TRK mode, or the servo is not ON. Putting the Pro Pilot into the Track (TRK) mode will again activate the GPSS and GPSV guidance.

  • Page 44: Unusual Conditions

    Example Approach Scenario For purposes of illustration, assume we are cruising in the en route mode, the Pro Pilot is using the ARINC 429 data for roll steering commands and is in altitude hold mode at 4,500 feet. The destination is Palomar Airport in Carlsbad, California (a sample approach chart is shown on the following page).
  • Page 45 Pro Pilot commands a “bend over” maneuver. The aircraft pitches down and begins to descend. The pilot immediately retards the throttle to remain at approach speed. The Pro Pilot will now direct the aircraft to remain on the lateral/vertical descent path to the airport. Trio Avionics Pro Pilot Manual...

  • Page 46: Chapter 10 Autopilot Preferences Menu

    (Aspen or G5). See “Aspen / G5 (RHBC) Integration” on page 52 for operational details. Backlight Set and Display Brightness Set The BACKLIGHT SET controls the backlighting of the indicators, LED’s and buttons. It allows setting Trio Avionics Pro Pilot Manual...

  • Page 47: Flight Distance And Flight Time

    To zero this value, press and release the encoder knob. 5. Press and release the H MODE to exit this function. The FL DIST, FL TIME procedure is complete and the encoder can now be used to select another menu screen. Trio Avionics Pro Pilot Manual...

  • Page 48: Accumulated Total Distance, Total Flight Time

     If the option is set to NO, the Pro Pilot will track directly outbound from the last waypoint in a flight plan, or the GOTO waypoint. The waypoint identifier will be placed in the lower left display line upon waypoint passage and will flash for 10 seconds to indicate passage.

  • Page 49: Selecting Airspeed Or Vertical Speed For Pcs

    Pilot has a means whereby the users can adjust the maximum rate of turn to their personal satisfaction. When shipped, the Pro Pilot is defaulted to an “automatic” mode where the actual turn rate is automatically adjusted based on groundspeed (as measured by your GPS) to limit the bank angle to approximately 15 to 20 degrees.

  • Page 50: Setting Led Flash Rate

    To prevent a momentary loss of power (while in flight) from resetting the values, the autopilot monitors airspeed and will not allow an automatic reset while in flight. Note: The TOTAL TIME and TOTAL DISTANCE values are not affected if this option is enabled. Trio Avionics Pro Pilot Manual...

  • Page 51: Custom Startup Display Screen

    Autopilot Software Version and Serial Number This screen is fixed and cannot be altered. It contains a permanent record of the manufacturer software version and device serial number. This data should be available if calling Trio Avionics for questions or service information...

  • Page 52: Chapter 11 Fuel Preferences Menu

    NOTE: Remember to press the encoder button to record the amount into memory and exit the screen. Zero Flt Fuel on Power Up If the fuel option is present this PREFERENCES menu selection now also allows automatic reset of the FUEL USED on each power up sequence. Trio Avionics Pro Pilot Manual...

  • Page 53: Adjusting K Factor

    The K FACTOR determines the accuracy of the fuel readings. The fuel flow transducers are characterized at the factory and the Pro Pilot will be set to the calibrated number, as shown here. However, because a number of factors in the fuel system installation can affect this, the K FACTOR may be calibrated to a more precise number.

  • Page 54: Setting Maximum Fuel Level

    (normally open) is required, and may be mounted on the control stick/wheel or instrument panel. The default setting is ‘NO’. Pressing the H MODE button will illuminate the arrow and allow the setting to be changed to ‘YES’ with the encoder. Trio Avionics Pro Pilot Manual...

  • Page 55: Chapter 12 Maintenance Screens

    Chapter 14 Maintenance Screens The Pro Pilot provides a quick and easy method to set up certain parameters - some that are normally only changed during installation and some that are commonly accessed in flight. These are divided into two different menus, the “Maintenance Screens” and the “Preferences Settings”.

  • Page 56: Minimum Airspeed Setup

    Minimum Airspeed Setup The Pro Pilot is capable of commanding the aircraft to climb and descend at rates up to 2000 feet per minute. It is therefore necessary to assure that the system cannot stall or over-speed the aircraft, even if a pilot enters a command that would precipitate such an event.

  • Page 57: Set Fuel Option

    Servo Gains Prior to adjusting any gains shown in this document, be sure that you have entered the proper values in the SET SERVO GAINS screen. These values will vary depending upon the aircraft type. Trio Avionics Pro Pilot Manual...

  • Page 58: Vnav Servo Set

    This procedure is a method that should be used to set the Altitude Hold (AH) Vertical Speed (VS) and Airspeed (AS) gains. ALTITUDE HOLD GAIN SETTING Trio Avionics Pro Pilot Manual...

  • Page 59: Altitude Hold Gain Setting

    8. If you observe significant deviation in smooth air from the selected climb rate perform the remaining steps. 9. If there is excess oscillation or the vertical rate is not achieving the selected value, enter the MAINTENANCE SETTINGS menus and select the VNAV GAIN SET display page Trio Avionics Pro Pilot Manual...

  • Page 60: Airspeed Gain Setting

    The autopilot may oscillate more than 20 feet above or below the selected altitude. c. A setting that is too high will cause an oscillation of a shorter period or result in a divergent altitude situation. Trio Avionics Pro Pilot Manual...

  • Page 61: Set Default Vertical Speed Rate

    SET HNAV GAINS section Vertical Trim Motor Speed / Direction In this menu item the Vertical Trim Speed and Direction menu screen shown below will be visible. This option Trio Avionics Pro Pilot Manual...
  • Page 62 6. Press and release the H MODE button. The arrow will be placed at the HAS (high airspeed) setting field.  Set the airspeed corresponding to the low trim speed (TH) setting. The V-TRIM SPEED/DIR is complete, and the encoder can now be used to select another menu screen. Trio Avionics Pro Pilot Manual...

  • Page 63: Trim Setting Example

    Rotate, or press the encoder to change the selection  Press and release the H MODE button. The AS/VS SELECT procedure is complete and the encoder can now be used to select another menu screen. Trio Avionics Pro Pilot Manual...

  • Page 64: L Nav Servo Set

    29. Press the HMODE button to remove the arrow from the display screen. Set HNAV Gains 1. Be sure to turn the AP on after engine start to stabilize the internal gyro before flight. Leave the autopilot ON unless otherwise noted. Trio Avionics Pro Pilot Manual...

  • Page 65: H Nav Servo Gain Adjustment

    TRK mode. This will disable the GPSS tracking and invoke RS232 tracking). b. Repeat steps 2, 3, and 4 until the arrow is pointing at the TRK gain. c. Minimize the track error (XTK) by adjusting the TRK gain. Trio Avionics Pro Pilot Manual...

  • Page 66: Setting Maximum Turn Rate

    Pilot has a means whereby the users can adjust the maximum rate of turn to their personal satisfaction. When shipped, the Pro Pilot is defaulted to an “automatic” mode where the actual turn rate is automatically adjusted based on groundspeed (as measured by your GPS) to limit the bank angle to approximately 15 to 20 degrees.

  • Page 67: Zero Flt Data On Power Up

    Trio Avionics logo and firmware number, but this may be changed by the user. Typically, most Pro Pilot customers place their name on the top line of the display and the aircraft model and tail number on the second line.
  • Page 68 5. Press the H MODE button until the right arrow is absent from the display The RESTORE DEFAULTS procedure is complete and the encoder can now be used to select another menu screen Trio Avionics Pro Pilot Manual...

  • Page 69: Chapter 12 The Servos

    1.5 inches to 2.4 inches will do the job. Then find a place to mount the servo nearby to accomplish this by means of the pushrod. Trio Avionics Pro Pilot Manual...
  • Page 70 Changing the crank arm mounting by 180 degrees will essentially reverse the direction of travel for the servo arm. In such a case the Pro Pilot must be programmed to reverse the drive signal. In the event unusual pitch changes occur in the first flight, the first check on the ground should be to be certain the servo direction of travel is correct.

  • Page 71: Servo Mounting Hardware

    Most aircraft get best performance in the outermost hole. In the event the servo rotation is insufficient, the servo mechanical stops may be removed. Contact Trio Avionics if this appears to be necessary. Servo Mounting Hardware The following picture shows the electrical and mechanical installation kit that is provided for the servos.

  • Page 72: Positioning The Servo Crank Arm

    Be sure that the rod end bearings never jam due to misalignment as the pushrod angle is varied by different combinations of control system input. Push the control stick (or control wheel) in all four corners to test this. Trio Avionics Pro Pilot Manual...

  • Page 73: Setting Servo Override Force (Slip Clutch)

    The servo Torque Control nut (the adjustment nut inside the servo on the output shaft) sets the override force - the force you will feel at the stick when the servo clutch begins to slip. Trio Avionics Pro Pilot Manual...

  • Page 74: Adjustment Of Servo Rotation Direction

    (so it won’t get lost while unpacking or installing the system). The proper servo rotation direction must be determined by the installer and will depend on how the servo is mounted and the crankarm orientation. Trio Avionics Pro Pilot Manual...
  • Page 75 “NM” and the direction of rotation will be reversed. If the elevators or ailerons do not move in the proper direction, the jumper plug inside the respective servo must be removed using the procedure on the next page. Trio Avionics Pro Pilot Manual...
  • Page 76 Lift off the servo cover by pulling it straight up and set aside.  Remove the shorting jumper from the PCB as shown below.  Replace the servo cover and two securing screws  Replace the DB-9 connector Trio Avionics Pro Pilot Manual...

  • Page 77: Chapter 13 Trim And Auto-Trim

    (AS/VS mode), improper trim may prevent it from achieving the proper climb or descent rate. The Pro Pilot will issue trim alerts to the pilot. If the elevator servo is equipped with the Auto-Trim option, it will automatically operate the existing aircraft electric trim to remove trim errors.

  • Page 78: Auto-Trim Operation

    It is a common complaint that electric trim operation is often “too fast” and difficult to adjust properly. To address this, the Pro Pilot offers an effective means to adjust the speed at which the elevator trim motor runs. Adjusting the trim speed is covered in the PREFERENCES MENU – Chapter 10 The drive to the trim motor originates within the Trio Gold Standard (GS) servo.

  • Page 79: Switching Between Manual Trim And Auto-Trim

    Option 2: Shows a method that disengages the automatic trim circuit from the GS servo whenever the manual trim switch is operated. Trio Avionics Pro Pilot Manual...

  • Page 80: Chapter 14 Aspen / Av30 / Garmin G5 Integration

    If the remote equipment has both course and heading output functions control is passed to either one when the respective pointer is moved greater than two degrees from its static setting. For example, assume the heading bug is being used to control lateral navigation. The pilot then decides he Trio Avionics Pro Pilot Manual...

  • Page 81: Operation

    GPS data ceased. This is done to prevent a lateral navigation excursion if the remote heading bug is selected to some other heading when the failure occurs. Trio Avionics Pro Pilot Manual...

  • Page 82: Ext Course Enable Selection

    GPS course being followed, the autopilot will automatically set the commanded course to the last heading bug angle received from the Remote Trio Avionics Pro Pilot Manual...

  • Page 83: Remote Condensed Setup And Operating Procedures

    Enter the PREFERENCES menus and set the CRS MODE to AUTO ENABLE Place the data selector switch (shown at the end of this chapter) to either the EFIS or GPS position. Assume it is in the EFIS position. Trio Avionics Pro Pilot Manual...

  • Page 84: Operating Procedures For Selected Altitude Operations

    (AS) if the PREFERENCES setting specifies AS, or will remain in the VS mode if the PREFERENCES SETTING specifies VS. Pressing and holding the VMODE button for three seconds cancels the climb or descent and the altitude preselect and sets the altitude hold (AH) mode Trio Avionics Pro Pilot Manual...
  • Page 85 Trio Avionics Pro Pilot Manual...

  • Page 86: Chapter 15 Alerts, Warnings And Alarms

    Alerts, Warnings and Alarms The Pro Pilot employs a number of sensors to monitor proper operation in the control electronics and the servos. When it detects a possible problem, it will notify the pilot via messages on the display screen and, if appropriate, via an audible alarm.

  • Page 87: Chapter 16 Wiring Diagrams

    Chapter 16 -Wiring Diagrams Trio Avionics Pro Pilot Manual...

  • Page 88: Arinc 429 Wiring

    ARINC 429 ARINC 429 WIRING It is recommended that the ARINC 429 and RS232 data lines be wired to the Pro Pilot through a 3 pole switch (toggle or rotary) generally available at various electronics supply companies. This will allow the selection of a backup GPS receiver in the event that the primary GPS receiver or EFIS becomes inoperative.

  • Page 89: Fuel Sensor Connections

    Fuel Sensor Connections Trio Avionics Pro Pilot Manual...

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