STC GROUP LLC 480 RUDDIMAN DRIVE NORTH MUSKEGON, MICHIGAN REPORT NO: REVISION A

Transcription

1 480 RUDDIMAN DRIVE NORTH MUSKEGON, MICHIGAN REPORT NO: REVISION A TRIO AUTO PILOT INSTALLATION INSTRUCTIONS CESSNA MODEL 180F & LATER, CESSNA 185 ALL MODELS NO PREVIOUSLY INSTALLED FACTORY NAVOMATIC AUTOPILOT DATE: Original Issue 29 November, 2017 WRITTEN BY: Paul Odum APPROVED BY: Jeff Ley

2 REVISIONS Rev. Date: By: Approved By: - 29 November 2017 Paul Odum Jeff Ley A 15 December 2017 Paul Odum Jeff Ley ER No: 1002 Section: All Section 5 Description Initial Release Changed to Appendix A. Appendix A changed to Appendix B. Page 1 of 31

3 TABLE OF CONTENTS TABLE OF CONTENTS... 2 LIST OF TABLES... 3 LIST OF FIGURES... 4 LIST OF IMAGES... 5 REFERENCES... 6 TOOLS NEEDED... 7 ACRONYMS, ABBREVIATIONS, AND SYMBOLS TRIO PRO PILOT AUTOPILOT INSTALLATION GENERAL ROLL SERVO INSTALLATION RIGHT (STARBOARD) WING PITCH SERVO INSTALLATION PITCH SERVO MOUNT INSTALLATION SERVO TRAY MOUNTING, PUSH PULL TUBE INSTALLATION, POSITIONING THE SERVO ARM APPENDIX A - TRIO PRO PILOT AUTOPILOT INSTALLATION APPENDIX B Page 2 of 31

4 LIST OF TABLES No table of figures entries found. Page 3 of 31

5 LIST OF FIGURES FIGURE 1 AUTOPILOT INSTALLATION FIGURE 2 WING ACCESS COVER LOCATIONS CESSNA 182 FIGURE 3 ROLL SERVO & MOUNTING PLATE INSTALLATION FIGURE 3A ROLL SERVO & MOUNTING PLATE INSTALLATION FIGURE 4 ROLL SERVO BRACKET ASSEMBLY AT FS STA FIGURE 5 FIGURE 6 FIGURE 7 FIGURE 8 FIGURE 9 WS SERVO MOUNT RIB LOCATION VIEW LOOKING OUTBOARD AT STA RIB ROLL SERVO HUB DRIFT PIN AND LOCKING PIN HOLE ALIGNMENT ROLL SERVO PUSH PULL TUBE ASSEMBLY ROLL SERVO ARM INSTALLATION FIGURE 9A ROLL SERVO ARM INSTALLATION FIGURE 10 FIGURE 11 AILERON BELLCRANG INSTALLATION AILERON BELLCRANK INSTALLATION FIGURE 4-1 PITCH SERVO INSTALLATION FIGURE 4-2 PITCH SERVO TRAY INSTALLATION FIGURE 4-3 PITCH SERVO SHELF & ZEE ANGLES ALIGNMENT FIGURE 4-4 ZEE ANGLE LAYOUT FIGURE 4-5 PITCH SERVO SHELF ASSEMBLY POSITIONING Page 4 of 31

6 LIST OF IMAGES IMAGE 1 IMAGE 2 IMAGE 3 ACESS PANEL SCREWS AND ZEE ANGLE RIVET LOCATIONS MAGNAVON BUSHINGS ZEE ANGLE RIVET LOCATIONS A-1 GROEN CONSTANT PRESSURE CLAMP Page 5 of 31

7 REFERENCES The following documents form a part of this report. Unless a specific revision of one of these documents is specified, the revision in effect at the time of original issue of this document shall apply. STC Group LLC Document Number Cessna 182 Illustrated Parts Catalog Industry Specifications and Standards: 1. MMPDS-09 Metallic Materials Properties Development and Standardization 2. AC B Aircraft Inspection, Repair & Alterations Other Data: ER1006 STC GROUP LLC Program Engineering Record. Page 6 of 31

8 TOOLS NEEDED Drills Cordless 90-degree air drill 45-degree air drill #40 drill bits #40 ¼ x 28 threaded drill bits Silver Cleco P Series Temporary Fasteners Copper P Series Temporary Fasteners Side grip cleco clamps Cleco pliers 24 ruler or tape measure 6 ruler Light Foam knee pad Page 7 of 31

9 ACRONYMS, ABBREVIATIONS, AND SYMBOLS Autopilot Clip C.G. ER FAA ICA LH OEM OTBD PCS Recover RH Servo STC WS Autopilot Trio Pro Pilot Autopilot Part Number Center of Gravity Engineering Record Federal Aviation Administration Instructions for Continued Airworthiness Left Hand Original Equipment Manufacturer Outboard Pilot Controller Steering (Red) Button Recover Button Right Hand Trio Pro Pilot Gold Standard Servo Supplemental Type Certificate Wing Station Trio Pro Pilot Autopilot Page 8 of 31

10 1.0 TRIO PRO PILOT AUTOPILOT INSTALLATION This installation procedure provides information and data necessary to install bracketry and hardware provisions for mounting the Trio Auto Pilot Controller along with the Pitch and Roll servos in Cessna Aircraft Model 182 aircraft that did not come equipped with a factory Navomatic autopilot. These installation instructions apply to Cessna 182E and later models. Serial numbers and later. Areas of modification FIGURE 1 AUTOPILOT INSTALLATION Page 9 of 31

11 2.0 GENERAL Thank you for your purchase of the TRIO Pro Pilot Autopilot for your Cessna. This document is written to ensure your installation is easy, ensures safety, and is professionally completed. Before you begin Read All Instructions. Call Jeff Ley at The STC Group LLC at (661) call/text/phone/vm if you have hardware installation questions. Check all items included in the kit to ensure all parts are accounted for. Jeff Ley of the STC Group LLC is available Sunday through Friday. You may contact Paul Odum at (805) on Saturdays. Call Trio Avionics with all Trio Pro Pilot autopilot related questions. Trio Avionics may be reached (619) seven days per week. Installation drawings are denoted in the References section above and throughout these installation instructions. Drawings may be downloaded along with the Illustrated Parts Catalog from The STC Group LLC website at Note The aileron and elevator control surfaces must be locked into the neutral flight position before starting the installation procedure. Remove control lock first. Care should always be taken to avoid marring or scratching any surfaces of autopilot assemblies including anodized surfaces. Painters tape may be used to prevent marring hardware surfaces. Page 10 of 31

12 3.0 ROLL SERVO INSTALLATION RIGHT (STARBOARD) WING 1. Remove the inspection panels at WS and WS as depicted in Figure Lower the flaps. FIGURE 2 WING ACCESS COVER LOCATIONS CESSNA Insert the servo bracket assembly, p/n , through the access hole at STA 112 and align the bracket with the STA rib as depicted in Figure Center punch and drill the upper rear hole though the WS trim piece as shown in Figure 3A using a #40 drill. Drill from outside the aircraft as depicted in Figure 3A. Note: This is a critical measurement and hole location. The first mounting hole for the bracket should be drilled approximately one (1) inch forward of the rearmost rivet on the trim piece. Refer to Figure 3A. 5. Remove the bracket and apply painters tape to the rear side of the bracket. 6. Use a P Series silver cleco to secure the servo bracket into position using the hole drilled in Step 3. A draw cleco may be required due to aircraft manufacturing variations. 7. Firmly press the bracket against W.S rib to mark rivet locations on the rib. Refer to Figure 4. Locating hole locations. 8. Mark the rivet locations using the marks made by the rivets on the painter s tape. 9. Confirm the rivet locations using the locating holes as a measuring reference. 10. Drill a pilot hole into the servo bracket at the rivet locations and enlarge as required with a step drill. 11. Deburr the holes and use a P Series silver cleco to secure the bracket into place. Page 11 of 31

13 12. From inside the wing center punch through the servo bracket nutplate into the W.S rib. Refer to Figure 4 - Second Hole. FIGURE 3 - ROLL SERVO & MOUNTING PLATE INSTALLATION First Hole at WS Drill from outside of aircraft and locate between first & second trim piece rivets as shown. 1 inch - Approx First Trim Piece Rivet FIGURE 3A - ROLL SERVO & MOUNTING PLATE INSTALLATION Page 12 of 31

14 Holes drilled in servo bracket to clear rivets. First hole drilled from outside through trim piece Locating Hole Second Hole FIGURE 4 ROLL SERVO BRACKET ASSEMBLY AT FS STA Move the bracket out of the way and pilot drill the punched site using a #40 drill bit. Deburr & use a P Series silver cleco to secure the bracket back into position from outside the aircraft. 14. Center punch through the remaining nutplates onto the W.S rib. Refer to Figures 4 & 6. Installation Area Left Wing Station shown FIGURE 5 WS SERVO MOUNT RIB LOCATION 15. Remove the servo mounting bracket. Page 13 of 31

15 FS STA Flap Closeout Rib Servo Bracket Screws - 1 hidden First Hole WS FIGURE 6 VIEW LOOKING OUTBOARD AT STA RIB 16. Pilot drill the marked holes made in Step 8 using a #51 or #40 drill bit. 17. Use a P Series silver cleco to secure the servo mounting bracket back into position and check for fitment. 18. Correct the fitment if required. 19. Remove the servo mounting bracket and enlarge the four (4) holes made in Step 10 above using a #30 drill bit and sure the bracket into position using P Series copper clecos. 20. If satisfied with bracket alignment and fitment drill to final size using a #18 drill bit. 21. Deburr all holes. 22. Coat the four (4) M3 screws supplied in the autopilot hardware kit with Blue Loctite (Medium) 242 thread locker. Allow to dry completely before installation. 23. Fasten the servo arm to the servo hub using the four (4) M3 (metric) screws supplied. Refer to Figures 7, 8 and Mount the roll servo to the bracket assembly using the four (4) MS screws. The bracket assembly and servo must be joined together inside the wing. Note The Roll Servo hub roll pin hole must be aligned with the servo stop as depicted Figure 7 before attaching the crankarm to the hub. The four (4) outer baseplate holes must be enlarged for #8 screws using a #18 drill bit. Refer to Figure 7. Page 14 of 31

16 Roll servo hub drift pin hole Roll servo locking pin Enlarge baseplate holes for #8 screws 4 places FIGURE 7 ROLL SERVO HUB DRIFT PIN AND LOCKING PIN HOLE ALIGNMENT Note: The push pull tube assembly has been terminated on a single end to allow for manufacturing variations between Cessna models. The STC Group LLC has decided to eliminate fully terminated push pull tube assemblies to allow for variations between aircraft. 25. Ensure that the aileron surfaces are locked in the neutral flight position. This can be accomplished with the control lock if desired. Note: The push pull tube must be protected from damage by using painters tape or equivalent. 26. Install the push pull tube through the access hole at WS with the rod end oriented towards the roll servo arm. 27. The rod end should have four (4) threads showing. 28. Attach the push pull tube to the roll servo arm as depicted in Figure The servo arm should be at 90-degrees from the servo case, facing forward towards the rear spar web. 30. Measure the push pull tube from the center of the servo arm to the center of the aileron bellcrank mounting position. Refer to Figures 9 and Mark the push pull tube with a permanent marker at this location on the painter s tape. This mark represents the center to center distance between rod ends. Refer to Figure 9A. 32. Remove the push pull tube from the wing. 33. Measure from the center of the servo arm rod end to the mark that was made on the push pull tube in Step 31. Page 15 of 31

17 34. This measurement will be the Center to Center Rod End measurement with four (4) rod end threads showing on each end. 35. Trim the push pull tube as required to meet the above center to center distance. 36. Deburr and smooth the push pull tube. 37. Insert the threaded rod end provided in the hardware kit into the unterminated (trimmed) end of the push pull tube. 38. Using a V Block drill through the push pull tube using a #30 drill bit and deburr. Refer to Figure 9A for rivet positioning. 39. Insert the threaded rod end back into the push pull tube and install two MS20470AD4-10 rivets into the holes drilled in Step 32. Be careful not to distort the rivets when squeezing. 40. Thread the rod end and jam nut into the threaded rod insert with four threads showing. 41. Tighten the jam nut (four threads showing) and mark with tamper proof torque seal. 42. Install the Push Pull tube assembly. Refer to Figures 9, 10, & The Servo arm should be next to upper wing skin as depicted. 44. Attach the DB9 connector to the servo DC9 connector after completing the Wiring harness installation in Appendix A. 45. Install the roll servo to the servo mounting bracket using the MS27039 screws 46. Secure the roll servo to W.S using the AN525 screws. FIGURE 8 ROLL SERVO PUSH PULL TUBE ASSEMBLY Page 16 of 31

18 FIGURE 9 ROLL SERVO ARM INSTALLATION Trim to length as required FIGURE 9A ROLL SERVO ARM INSTALLATION Page 17 of 31

19 FIGURE 10 AILERON BELLCRANK INSTALLATION FIGURE 10A - AILERON BELLCRANK INSTALLATION Page 18 of 31

20 FIGURE 11 AILERON BELLCRANK INSTALLATION Page 19 of 31

21 4.0 PITCH SERVO INSTALLATION Servo Arm at 1 O clock position Facing Passenger Cabin Pitch Servo P/N FIGURE 4-1 PITCH SERVO INSTALLATION Note: The elevators must be locked into the neutral position prior to pitch servo installation. Wood blocks installed on the upper and lower elevator surfaces and four (4) inch1/4x20 or 28 bolts, washers, and nuts may be used. Protect all aircraft surfaces. The Pitch Servo arm must face forward towards the passenger cabin at approximately the 1 o clock position. Refer to the red arrow in Figure 4-1. Page 20 of 31

22 4.1 Pitch Servo Mount Installation 1. The edges of the pitch servo tray and Zee Angles have been pilot drilled with #40 holes. 2. Secure the pitch servo tray to the Zee Angles using four (4) P Series silver cleco clamps. Refer to Figure ZEE MS21075L08N #8-32 nutplates (4) ZEE FIGURE 4-2 PITCH SERVO TRAY INSTALLATION FIGURE 4-3 PITCH SERVO SHELF & ZEE ANGLES ALIGNMENT Page 21 of 31

23 3. Remove the fasteners that secure the elevator idler bellcrank inspection panel as shown in Figure 3- Rivet Locations (may vary) Elevator Inspection Panel 3. IMAGE 1 ACCESS PANEL SCREWS AND ZEE ANGLE RIVET LOCATIONS 4. Fasten the pitch servo to the pitch servo tray using MS27039 fasteners provided. Take a permanent marker with you to complete the next steps. 5. Access the aft area of the aircraft by removing the baggage compartment cover. 6. Protect the elevator, trim cables, aircraft structure, and any avionics with padding and blankets. 7. Access the fuselage between F.S and F.S Refer to Figure Position the Pitch Servo Tray Assembly between the left hand and right-hand stringers and slide the assembly aft until the ZEE Angles are snug against the stringers. Figures 4-4 and 4-5. Mark position of Zee bracket edges fore and aft 4 places FIGURE 4-4 ZEE ANGLE LAYOUT Page 22 of 31

24 9. Measure the distance between the aft end of the Pitch Servo Tray and the face of the F.S frame web. Refer to Figures 4-4 and 4-5. The distance is approximately This distance will vary due to manufacturing variations. Mark position of Zee bracket edges fore and aft 4 places Pitch servo mounting holes (4) Aft edge of pitch servo tray FIGURE 4-5 PITCH SERVO SHELF ASSEMBLY POSITIONING 10. Have an assistance attach the pitch servo push pull tube to the elevator idler bellcrank using the hardware provided. 11. The rod ends at each end of the servo push pull tube should have a four (4) threads showing. 12. Position the servo arm facing forward at the 1 oclock position. Refer to Figure Position and then loosely attach the rod end to the servo arm using the AN4-10 bold provided. 14. The pitch servo tray is now in the correct mounting location. 15. Once again measure the distance between the aft face of the servo tray and the face of F.S Again - this distance should be approximately This may vary due to manufacturing variations. 17. Mark the forward and aft edges of the Zee Angles using a permanent marker. 18. Remove the tray assembly. 19. The area between the fore and aft marks will indicate the fuselage skit rivets that must be removed. 20. Mark the fore and aft rivet locations. Refer to Figure 4-4 and Image 6. Note: Skin-stringers fasteners must align with the ZEE angles with a minimum edge distance of 0.20 inch from the ends and edges of the ZEE angles. Fasteners that will intersect the ZEE angles less-than 0.20 inches are to be omitted. 21. Have an assistance center punch and remove the factory rivets. Begin with a pilot drill. A #51 is recommended followed by a #40 drill to remove the factory rivets. Page 23 of 31

25 Caution: Take care to prevent enlarging the fastener holes when drilling off rivet heads. 22. Deburr the rivet holes and vacuum the area to remove any debris left from drilling. 23. Place the pitch servo tray assembly into position with the Zee Angles between the marks make in Step 17. Note: The STC Group LLC recommends the use of Magnavon bushings or equivalent for accuracy and to prevent enlarging holes. IMAGE 2 MAGNAVON BUSHINGS 24. Using a Magnavox, or equivalent, drill guide, #40 drill bit, and the aft rivet hole as a guide, drill through port and starboard Zee Angles. 25. Secure the Zee Angles using P Series silver clecos after drilling. 26. Using a #40 drill bit rill through the forward rivet hole locations into the Zee Angles and secure using P Series silver clecos. 27. Using a #40 drill bit drill and cleco the remaining holes. 28. Enlarge the pilot holes and ZEE Angles using a #30 drill bit. 29. Secure each hole after drilling using a P Series copper cleco. Caution: Take care to prevent enlarging fastener holes in the belly skin. 30. Remove the clecos and Pitch Servo Tray Assembly. 31. Deburr all drilled holes. 32. Clean the entire area with a vacuum insuring no aluminum is present under the stringers. 33. Match drill (4) pilot holes in the Pitch Servo Tray and ZEE angle with a #17 (0.173) drill bit. 34. Install (4) MS21075L08N #8-32 nutplates, two on each of the return flanges of the ZEE Angels as shown in View B-B. Refer to Figure Use P Series silver clecos to secure the ZEE Angles into position and rivet into position using the rivets provided. 36. MS20470AD4-4 driven rivets (recommended) or Cherry Max CR rivets may be used in lieu of driven rivets to secure the Zee Angels into position. 37. Install four (4) MS screws to secure the Pitch Servo Tray to the ZEE angles. Page 24 of 31

26 Typical OE Skin-Stringer Fasteners Elevator Inspection Panel IMAGE 3 ZEE ANGLE RIVET LOCATIONS 4.2 Servo Tray Mounting, Push Pull Tube Installation, Positioning the Servo Arm 1. Mount the Pitch Servo to tray as directed in the last section. 2. Ensure the push pull tube to connection the elevator idler bellcrank is attached securely using the supplied hardware. Four (4) threaded should be showing on the rod end. Refer to Figures 4-1 and Mark the Rod end jam nut with tamper proof torque seal. FIGURE 4-6 ELEVATOR IDLER BELLCRANK PUSH PULL TUBE INSTALLATION Page 25 of 31

27 FIGURE 4-7 PITCH SERVO PUSH PULL TUBE INSTALLATION 4. The pitch servo was fastened to the the pitch servo tray using the MS fasteners supplied in the pitch servo kit in a previous step. Check fastener torque. 5. Position the servo arm as shown in Figure 4-1. The servo arm should face towards the front of the aircraft at approximately the 1 o clock position. 6. Attach the push pull tube to the servo crank arm using the hardware supplied. Refer to Figure It may be necessary to user spacers to prevent the rod end jam nut from contacting the servo arm. 8. Verify push pull tube has proper clearance from control cables clearance is sufficient. 9. It is recommended to cover the pitch cable with I.D. plastic tubing (available at any hardware store) as an anti-chaff indicator. 10. Secure the tubing with tie warps. 11. Twelve (12 ) inches should suffice for this purpose. Tubing may be removed at the next inspection interval if no chafing is present. Or the tubing may be left in place. 12. Due to manufacturing differences, there may be a clearance problem with the lower pitch cable. If there is an issue with interference, perform Step If there is interference with the cables, the pitch servo tray mounting holes may be elongated by approximately 0.15 so that the tray sits more to the starboard side of the aircraft. Note: Contact Jeff Ley at the STC Group prior to performing any modifications to the pitch servo installation. Jeff may be reached at The following modification should correct any manufacturing differences between aircraft years. 15. Un-mount the servo but leave the unit assembled. Remove the pitch servo tray. 16. Mark the tray and center punch. 17. Drill a pilot hole using a #51 drill bit in that location. 18. Using a #17 drill (0.173 ) enlarge the pilot hole. Deburr and reinstall the pitch servo tray. 19. Mount servo and recheck clearances. If a problem remains recheck push pull tube assemble for correct positions of spacers and washers. If the problem continues contact The STC Group for technical support. 20. Install and check all screws for the proper torque once the tray is aligned. 21. Remove the blocks that were used to neutralize the elevator controls. 22. Check for full range of motion on pitch controls and recheck for clearance on the cables. Page 26 of 31

28 APPENDIX A - TRIO PRO PILOT AUTOPILOT INSTALLATION 5.0 NOTE Prior to plugging harness DB9 or DB37 into servos or autopilot control perform a full power, ground, and data test on the harness by ringing the wires from plug to plug using PRO PILOT WIRING HARNESS DWG or latest approved version. Refer to Appendix B. Call Trio Avionics at if you have additional questions or need assistance. The Trio Pro Pilot autopilot controller must be integrated with the aircraft pitot and static system. A pitot and static system test must be performed prior to opening the pitot and static system. Roll Servo Harness Installation 1. Remove interior trim panels on cockpit passenger side 2. Remove existing Cessna factory autopilot wiring and set aside for weighing if so equipped. 3. Route Trio Harness Roll servo wiring along same path and using the same clamps as factory autopilot wiring. 4. Take care to protect harness pins at end of harness. 5. Terminate supplied DB9 connector per Trio diagram. 6. Attach DB 9 connector to Trio Roll Servo. 7. Secure harness cable end at the servo end with supplied clamp or equivalent. Pitch Servo Harness Installation 1. Remove co-pilot seat 2. Route Trio Harness Pitch servo wiring under cockpit floor taking care to secure away from other aircraft wiring and moving components. 3. Route harness to Trio Pitch Servo location. 4. Take care to protect harness pins at end of harness. 5. Terminate supplied DB9 connector per Trio diagram. 6. Attach DB 9 connector to Trio Roll Servo. 7. Secure harness cable end at the servo end with supplied clamp or equivalent. Trio Autopilot Controller 1. The Trio autopilot controller is ordered in Panel Mount or Instrument Mount versions. 2. The Trio autopilot controller will support 12 to 30 volts. 3. The Trio controller is provisioned with Pitot and Static ports. 4. A pitot static system check must be performed before installation to verify system operation and integrity. 5. The Trio Pro Pilot autopilot controller is provisioned with Pitot and Static ports on the rear of the controller. 6. The controller pitot and static ports must be integrated (plumbed) into the aircraft pitot and static systems. 7. Every aircraft Pitot and Static system is different. The following are for example only as the aircraft systems will vary. Page 27 of 31

29 8. The following components, or equivalent, will be used in most installations.: a. Tygon tubing. 2 each x 24 pieces. Aircraft Spruce P/N , or equivalent. b. Nylo Seal fittings. 2 each. Aircraft Spruce P/N 264-N04. c. Nylo Seal Inserts. 8 each. Aircraft Spruce P/N 259-N04. d. Groen ¼ constant pressure clamp or equivalent. 2 each. Refer to Image Extend the pitot & static hoses & cable connector through the tray and out through the front of the instrument panel to allow for ease of servicing. 10. Mate the pitot and static hoses to the control head. 11. Apply constant pressure clamps to secure pitot and static connections at the rear of the autopilot controller. Refer to Image Mate the 37 pin D connector to the control head using the screws provided. 13. If using an Instrument mount control head secure the control head using #6 brass instrument screws. 14. If using a Panel mount control head slide the control head into the tray, then tighten the securing screw. Do not over tighten control head in the tray. 15. It is required that a pitot and static system leak test is performed after autopilot installation. 16. Install the controller using best practices in either panel or hole locations. Refer to AC for this step and all following steps. 17. Utilize Trio DWG and Appendix B for the following steps. 18. Install supplied 5 ampere circuit breaker within easy reach of the pilot and label per Illustrated Parts Catalog Sheet 2 of If a Panel Mount unit is ordered install the supplied power switch and label. 20. Terminate supplied DB37 connector per Trio drawing in Step Terminate wiring with aircraft GPS or handheld. 22. If ARINC 429 is available from GPS terminate ARINC 429 connections. 23. Install the supplied PCS button on the left side of the pilots control yoke and label PCS. 24. Install Recover button in an available convenient location within easy reach of the pilot and label AP Recover. 25. Ensure that the analog alarm out is connected to the un-switched audio input on the Audio Panel. 26. Install Limitation Placard, P/N , supplied in plain view of Pilot. Trio Autopilot Data Connections 1. For the RS-232 connection set the output at the GPS unit to "Aviation w/ no altitude" or NMEA 0183 OUT. 2. If your aircraft is equipped with a GPS that has ARINC 429, set unit to output "GAMA" Low Speed. 3. Prior to making the connections to the GPS unit in the aircraft determine what else is connected. 4. It may be necessary to parallel the connections. a. If parallel connections are required, verify that the lines you are connecting to use, or can use, the same data format that is required. Page 28 of 31

30 5. Both the RS-232 and the ARINC 429 can be paralleled with like connections. Trio Initial Setup and Checks 1. Refer to The Avionics Addendum Section 10 for initial checks and setup of the autopilot installation. 2. Autopilot gain settings have been programmed before shipment. 3. Individual aircraft may require fine tuning of servo gains on the first few test flights. 4. The Avionics Addendum may be downloaded at IMAGE A-1 GROEN CONSTANT PRESSURE CLAMP (OR EQUIVALENT) END Page 29 of 31

31 APPENDIX B TRIO PRO PILOT WIRING DIAGRAM Page 30 of 31