Install Manual Part 3

ManualsBrandsL-3 Communications, Avionics Systems ManualsElectronicsSkyWatch Traffic Advisory System

SKY497

Installation Manual

4-1

Rev. C

CHAPTER 4

MAINTENANCE

4.1 INTRODUCTION

This chapter contains general flight-line maintenance and troubleshooting procedures for installations

interfaced to WX-1000/SKY497 display or an alternate display. Removal of components is on condition of

failure. Troubleshooting is intended to aid in isolating failures to a defective assembly. Each time the TRC,

directional antenna, or directional antenna cables (including connectors) are replaced, the TRC must be

calibrated to the directional antenna (refer to paragraph 4.4.1).

4.2 CONTINUED AIRWORTHINESS

No scheduled maintenance is required to ensure continued airworthiness.

4.3 PERIODIC MAINTENANCE

At regular inspection intervals, do the periodic maintenance procedures of paragraph 4.3.1 thru 4.3.3.

4.3.1 WX-1000/SKY497 Display

1. Check that indicator cable is properly mated and secured.

2. Check to ensure unit is properly placed and secured to the instrument panel.

CAUTION

Do not use cleaning solvents on the viewing face.

3. Check face-plate for cleanliness. Wipe the viewing face with a damp lint-free, static-free cloth. If

necessary, clean with a soft cloth moistened with a mild solution of soap and water. Take care to

prevent cleaning solution from running down inside the case.

4.3.2 TRC

1. Check that connectors are properly mated and secure.

2. Check to ensure that the hold-down knobs on the mounting tray are secured to the TRC.

4.3.3 Antenna

1. Check for dents, cracks, and punctures.

CAUTION

Do not paint the antennas.

Do not use cleaning solvents on the antennas.

2. Remove all dirt and grease from surface areas. Clean with a soft cloth moistened with mild soap and

water.

3. Visually inspect sealant around the antenna base. Reapply sealant if required.

Summary of content (52 pages)

PAGE 1
SKY497 Installation Manual CHAPTER 4 MAINTENANCE 4.1 INTRODUCTION This chapter contains general flight-line maintenance and troubleshooting procedures for installations interfaced to WX-1000/SKY497 display or an alternate display. Removal of components is on condition of failure. Troubleshooting is intended to aid in isolating failures to a defective assembly.
PAGE 2
SKY497 Installation Manual 4.4 SERVICE MENU The Service Menu is intended as an aid in installing, testing and troubleshooting the SKY497. Service Menu items are to be used only for testing and troubleshooting an installation. The Service Menu is not intended to be used by the pilot during normal system operation. When interfaced to an alternate display the service menu functions must be performed by using an RS-232 terminal device, see appendix D for operating instructions.
PAGE 3
SKY497 Installation Manual 4.4.1 Calibration NOTE Ensure transponder is in standby while doing calibration. Each time the TRC, directional antenna, or any of the directional antenna cables (including connectors) have been repaired or replaced the TRC must be calibrated. Calibration is accessed by selecting that option from the Service Menu (i.e., press SELECT with Calibration high-lighted). The initial calibration screen (see figure 4-2) shows the current calibration value in degrees.
PAGE 4
SKY497 Installation Manual The calibration value (000-359) is derived from a variety of measurements. Specific values are meaningless however, in a failed TRC, a varying spread may indicate problems with the directional antenna system (antenna, cables, or connectors) or the TRC. If the calibration failed, the message “Re-calibration Failed!” will be display (see figure 4-4). Figure 4-4. Failed Calibration Press YES to calibrate; press NO to return to the Service Menu. Soft-keys (3) and (4) are not used. 4.
PAGE 5
SKY497 Installation Manual The System Log displays the results in the following format: ### HHHHH:MM where: ### HHHHH:MM = = Error code. Run-time (in hours and minutes) at which error occurred. The total elapsed run-time is displayed in the upper middle portion of the screen (System Time HHHHH:MM). A textual description of the highlighted error entry is displayed in the bottom portion of the screen.
PAGE 6
SKY497 Installation Manual The buttons perform the following operations: • EXIT - returns to the Service Menu (figure 4-1). • SELECT - selects the highlighted item. • PREV - steps to the previous item. • NEXT - steps to the next item. 4.4.3.1 Software Version. The software version screen (see figure 4-7) identifies: • IOP Code Version • IOP Boot Version • STP Code Version • STP Boot Version Software version can be accessed with a terminal device by using the Version command. Figure 4-7.
PAGE 7
SKY497 Installation Manual NOTES 1. Saved configuration data is read at power-up and compared with configuration jumpers. If the saved configuration data has never been saved (e.g., new installations) an ERROR 30 Check Configuration will occur when the box comes out of standby. If the saved configuration data does not match the current jumper(s) an error 30 will occur at power-up. The conflicting jumper(s) will be highlighted on configuration screen(s). (See figure 4-8.) 2.
PAGE 8
SKY497 Installation Manual NOTE The RS422 Interface is used for factory testing and evaluation. Figure 4-9. Configuration - Page 2 Page 2 of 4 (see figure 4-9) displays: • Barometric Encoded Altitude (in Gray Code and Feet) • Connector P1 Pin Assignments for Data Inputs Figure 4-10. Configuration - Page 3 WARNING Verify displayed antenna position matches antenna location on the aircraft (top or bottom). Failure to do so could give incorrect traffic bearing. 4-8 Rev.
PAGE 9
SKY497 Installation Manual Page 3 of 4 (see figure 4-10) displays: • Antenna Position (Ant. Pos.: TOP or BOT) Configuration Jumper P1-100 (OPEN or GND) P1-100 OPEN GND Top Bottom* *See paragraph 2.3 (ANTENNA LOCATION) • Antenna Type (NY164 or NY156) Configuration Jumper P1-99 (OPEN or GND) NY164 NY156 • P1-99 OPEN GND Airframe (Ant. Pos.: FIX or ROT) Configuration Jumper P1-98 (OPEN or GND) Fixed Wing Rotorcraft P1-98 OPEN GND Figure 4-11.
PAGE 10
SKY497 Installation Manual Figure 4-12. Data Monitor - Page 1 NOTE Values displayed on the Data Monitor are continuously updated. The sensor source (e.g., ARINC 429, Synchro XYZ, etc.) is latched at power-up. If it is necessary to change a configuration, cycle power to ensure the correct information is read into memory.
PAGE 11
SKY497 Installation Manual Page 2 of 5 (see figure 4-13) displays: • Radio Altitude Source (ARINC 429, None, or Simulated) Altitude (in Feet) NOTE When the system is set to GROUND TEST, the radio altimeter simulated to 2,500 ft. Figure 4-14.
PAGE 12
SKY497 Installation Manual Figure 4-15. Data Monitor - Page 4 Page 4 of 5 (see figure 4-15) displays switch status: • Squat Switch (ON GND/FLYING) Connector P1-88 (SQUAT) Input (OPEN or GND) Flying On Ground • Landing Gear (UP/DOWN) Connector P1-87 (GEAR) Input (OPEN or GND) Gear Up Gear Down • P1-88 OPEN GND P1-87 OPEN GND GPWS (ACTIVE/INACTIVE) Connector P1-33 (GPWS) Input (OPEN or GND) Inactive Active P1-32 OPEN GND Figure 4-16.
PAGE 13
SKY497 Installation Manual 4.4.4. Ground Test Ground Test initializes the system for on-the-ground testing. In this configuration, the barometric altimeter is simulated to 50,000 ft, heading simulated to 0 degrees, and the radar altimeter simulated to 2,500 ft. NOTE Ground test is available only if the squat switch input indicates aircraft is on the ground. Ground test (see figure 4-17) is accessed by selecting that option from the Service Menu (i.e., press SELECT with Ground Test highlighted).
PAGE 14
SKY497 Installation Manual 4.5 TROUBLESHOOTING Table 4-1 is intended to assist trained electronic technicians to determine which assembly is inoperative. Do the corrective action steps in the order described. Use the Service Menu (refer to paragraph 4.4) as an aid in fault isolation. Information available from the service menu can help identify conditions that need to be resolved.
PAGE 15
SKY497 Installation Manual Table 4-1. Fault Isolation (Continued) SYMPTOM CORRECTIVE ACTION SKYWATCH paints itself as a target (e.g., TA). a. Verify suppression bus shielded cable is grounded correctly at both ends. b. Connect an oscilloscope to the suppression bus and verify that the SKY497 suppression pulse (100 µs ±5 µs) exceeds +15 V dc. c. If less than +15 V dc, the suppression bus is overloaded. d. Check all equipment connected to the bus. e. Repair/replace the offending device.
PAGE 16
SKY497 Installation Manual Table 4-2. Installation Related Error Messages (Continued) ERROR NO. MESSAGE Remarks ERROR 020 Barometric Altitude Input a. Check altimeter source. Is the unit turned on and been given enough time to warm up. NOTE When interfacing via an ARINC 429 serial data bus, at power-up the TRC must adjust (auto-baud) to the speed of the incoming data. Normally the TRC will lock-on after approximately 15 seconds. b. Cycle power. c.
PAGE 17
SKY497 Installation Manual The error messages in table 4-3 are used by factory technicians in determining what actions may have preceded a system failure. These messages do not necessarily indicate a current system failure and are provided for information only. Should the installer observe these messages in the error log without a SKY497 Failed message during normal operation, no service action is required. Table 4-3. Informational Error Messages ERROR NO. MESSAGE ERROR NO.
PAGE 18
SKY497 Installation Manual 4.7 TRC497/WX-1000 ADAPTER PLUG An adapter plug can be used to by-pass SKYWATCH if a WX-1000 Stormscope system is installed. The adapter will permit continued operation of the WX-1000 if the TRC497 is removed for service. It can also be used as a troubleshooting tool when attempting to isolate a problem to either or both systems. The adapter plug mates with P1.
PAGE 19
SKY497 Installation Manual 4.8 DISPOSITION OF FAILED ITEMS Return defective components to your authorized BFG Avionics Systems dealer or to:: BFG Avionics Systems Attn: Customer Service 5353 52nd Street, S.E. Grand Rapids, MI USA 49588-0873 If available, pack components in their original shipping container. If the original container is not available, pack them as follows: CAUTION Do not use desiccant crystals when packaging electronic assemblies.
PAGE 20
SKY497 Installation Manual This page intentionally left blank. 4-20 Rev.
PAGE 21
SKY497 Installation Manual APPENDIX A SKY497 INTERFACE SIGNAL & CABLE CHARACTERISTICS A.1 INTRODUCTION This appendix defines the electrical characteristics of all input and output signals to the SKY497 System. Sufficient data is included to perform an electrical load analysis for the aircraft. The interface characteristics contained in this appendix are fully compatible with ARINC specifications where noted.
PAGE 22
SKY497 Installation Manual SIGNAL CHARACTERISTICS Antenna Top Directional SUM (SIGMA) Port (Blue) CONNECTION CABLE Antenna Top Directional BIT PROBE Port (Black) CONNECTION CABLE Antenna TRC J9, TNC connector. Cable attenuation must not exceed 2.5 dB, VSWR 1.5:1. Refer to para 2.6.1. Impedance: 50 Ω TRC J10, BNC connector. Cable attenuation must not exceed 6 dB, VSWR 1.5:1. Refer to para 2.6.1. Impedance: 50 Ω Top Directional DIFFERENCE (DELTA) Port (Red) CONNECTION CABLE TRC J11, TNC connector.
PAGE 23
SKY497 Installation Manual SIGNAL CHARACTERISTICS ARINC 429 External Interface (Continued). Both transmitters (data sources) must be set to the same speed. The TRC will automatically adjust both receivers to the speed of the first detected incoming data. NOTE If 429 barometric altitude is used, it should be from the same source that is interfaced with the transponder or it must be at least as accurate as that source, i.e., ± 125 ft.
PAGE 24
SKY497 Installation Manual SIGNAL CHARACTERISTICS Display Power Power supply to WX-1000/SKY497 display. +15/-15 V dc from the WX-1000 Processor (if installed) and output to the display. CONNECTION CABLE VOLTAGE CURRENT Ground Proximity Warning System (GPWS) Flag Input P1-24 (DPWR+15_IN) From Processor P1-5 (DPWR-15_IN) From Processor P1-15 (DSPLY_GND) From Processor P1-7 (DPWR+15_OUT) To Display P1-6 (DPWR-15_OUT) To Display P1-14 (DSPLY_GND) To Display See paragraph 2.6.3. +15/-15 V dc 0.
PAGE 25
SKY497 Installation Manual SIGNAL CHARACTERISTICS Horizontal Sync Balanced horizontal sync from the WX-1000 Processor (if installed) and output to the WX-1000/SKY497 display. Signal levels as specified in RS-422. CONNECTION CABLE VOLTAGE CURRENT FREQUENCY LOAD Z Landing Gear Switch Input TRC P1-47 (HSYNC_IN_HI) From Processor TRC P1-46 (HSYNC_IN_LO) From Processor TRC P1-49 (HSYNC_OUT_HI) To Display TRC P1-48 (HSYNC_OUT_LO) To Display See paragraph 2.6.3. 0-5 V dc <100 mA 16.
PAGE 26
SKY497 Installation Manual SIGNAL CHARACTERISTICS RS422 Interface NO CONNECTION TO EXISTING AIRCRAFT WIRING. The RS422 Interface is available to support factory testing and analysis and SHOULD BE LEFT UNCONNECTED. NOTE RS422 interface is configured via jumper P1-67 (see Table A on the Interconnect Wiring Diagram, figures 2-2 and 2-3, sheet 2) located in the connector back-shell.
PAGE 27
SKY497 Installation Manual SIGNAL CHARACTERISTICS Soft-keys (Continued) VOLTAGE Squat Switch Input This signal line is to be connected to the squat switch to sense when the aircraft is on the ground (see para 2.6.12). CONNECTION CABLE VOLTAGE CURRENT Stepper Heading Input (King KCS55) Active: Min: 0.0 V Max: 1.5 V Inactive: Min: 3.5 V or Open (Internal 4.7 kΩ pull-up) Max: 5.0 V TRC P1-88 (SQUAT) Minimum 22 AWG wire for lengths up to 30 ft. IN FLIGHT Indication 4.
PAGE 28
SKY497 Installation Manual SIGNAL CHARACTERISTICS Suppression Bus I/O The SKY497 outputs a 100 µs (± 5 µs) suppression pulse on the aircraft suppression bus (see para 2.6.8). In addition, the SKY497 receives suppression signals from all other devices on the suppression bus (e.g., transponder, DME). (Reference ARINC 735-2 and DO-197A.) CAUTION The aircraft transponder must have suppression circuitry to ensure that SKYWATCH does not paint itself as a target (e.g., TA).
PAGE 29
SKY497 Installation Manual SIGNAL CHARACTERISTICS XYZ Synchro Input These connections from the aircraft heading source (ARINC Synchro Signal Practices) allow the unit to rotate the displayed data as the aircraft turns. NOTE Synchro heading input is selected via the Heading Input Source jumpers P1-69 & P1-70 (see Table A on the Interconnect Wiring Diagram, figures 2-2 and 2-3, sheet 2) located in the connector back-shell. X(S1), Y(S3), Z(S2) FREQUENCY Min: 50 Hz Max: 1500 Hz VOLTAGE Min: 5.
PAGE 30
SKY497 Installation Manual This page intentionally left blank. A-10 Rev.
PAGE 31
SKY497 Installation Manual APPENDIX B INSTALLATION CHECKOUT USING THE TCAS-201 RAMP TEST SET B.1 INTRODUCTION This appendix contains the self test and post installation checkout procedures. Refer to the SKY497 Pilot's Guide for complete operating instructions. The post installation checkout section contains instructions for doing the checkout procedure with an IFR Systems TCAS-201 Ramp Test Set (with TCAS I firmware). NOTES 1.
PAGE 32
SKY497 Installation Manual B.3 CHECKOUT PROCEDURE If the indications given in the following steps, except for the ramp test set, are not obtained, refer to the troubleshooting procedures in Chapter 4. If indications given for the ramp test set are not obtained, refer to the manual supplied with that equipment. 1. Enter and store the setup information identified in table B-1 (see next page) into the TCAS-201 Ramp Test Set. 2. Table B-1.
PAGE 33
SKY497 Installation Manual Figure B-2. Start-up Screen After approximately thirty seconds the display will show the STANDBY screen (see figure B-3). NOTE If the TRC has not been calibrated to the directional antenna (see step 6 below), the display may show a “SKY497 FAILED” message. Figure B-3. Standby Screen 5. Turn SKY497 OFF and then enter the Service Menu (see paragraph 4.4) by holding the left two buttons (soft-keys 1 and 2) depressed as the system is turned ON. 6.
PAGE 34
SKY497 Installation Manual 4) Change the status of the landing gear, squat switch, altitude, and heading sensors. Verify that the display shows the correct input (i.e., sensing of these signals). 8. Exit the service menu and do the SKYWATCH self-test (see para 3.4). 9. Do the SKYWATCH self-test (see para 3.4). 10. Turn SKY497 OFF, return to the Service Menu and select Ground Test (see paragraph 4.4.4). 11. Verify operation of range function. Soft-key (3) is labeled to indicate the current range.
PAGE 35
SKY497 Installation Manual e. Verify that the display shows an "other traffic" symbol (open diamond) at the 12 o'clock position (±30 degrees) approximately 5.0 nm and in level flight. The traffic symbol should be at an altitude of 500 ft above own aircraft (i.e., "+05") and moving towards your aircraft. f. When the target approaches closer than approximately 1 nm from own aircraft, verify that the symbol changes from an other traffic symbol (open diamond) to a traffic advisory (solid circle).
PAGE 36
SKY497 Installation Manual This page intentionally left blank. B-6 Rev.
PAGE 37
SKY497 Installation Manual APPENDIX C INSTALLATION CHECKOUT USING THE TIC T-49C FLIGHTLINE TESTER C.1 INTRODUCTION This section contains instructions for using the TIC T-49C Flightline Tester to do post-installation checkout of the BFG Avionics Systems SKY497. Detailed setup, operation and maintenance information for the T-49C Flightline Tester is provided in the T-49C Operating and Maintenance Instruction Manual. NOTES 1.
PAGE 38
SKY497 Installation Manual C.3 CHECKOUT PROCEDURE The T-49C Flightline Tester simulates a ground based secondary surveillance radar (SSR) when the TCAS INTRUDER selector switch is in the ATCRBS/Mode-S XPDR TEST position. When the T-49C intruder type switch is set to ATCRBS, the unit responds to ATCRBS Mode C interrogations. A varying delay time, controlled from the microprocessor, delays the replies returned to the SKY497 from as far as 14 nautical miles and as close as a few hundred feet.
PAGE 39
SKY497 Installation Manual Figure C-3. Standby Screen 3. Turn SKY497 OFF and then enter the Service Menu (see paragraph 4.4) by holding the left two buttons (soft-keys 1 and 2) depressed as the system is turned ON. 4. From the Service Menu, calibrate the TRC to the directional antenna (see paragraph 4.4.1). 5. Return to the Service Menu and select System Data (see paragraph 4.4.3). a. Verify status and save the configuration jumpers (see paragraph 4.4.3.2, Configuration). b.
PAGE 40
SKY497 Installation Manual 13a. Change the aircraft's transponder from STBY mode to the ON position. 14. Position the T-49C Flightline Tester on one of the test points identified in previous step. CAUTION The Flightline Tester is not weatherproof when the lid is open. Do not setup or operate the Flightline Tester in conditions of rain, sleet, etc. 15. Setup and verify operation of the T-49C Flightline Tester with the HI/LOW power switch in the HI position and then: a.
PAGE 41
SKY497 Installation Manual APPENDIX D Using the Terminal Device (e.g., Laptop Computer) A terminal device can be used as an aid in installing, testing and troubleshooting the SKY497. The terminal device must be connected to the RS-232 serial data TEST port (J7) located on the front of the TRC497. TRC connector J7 is a female DB9 receptacle. A standard serial cable that has RXD (pin 2), TXD (pin 3), and GND (pin 5) can be used. Any computer, with RS-232 terminal emulation software (e.g.
PAGE 42
SKY497 Installation Manual Commands Descriptions Arinc429 Displays the ARINC-429 sensor inputs and label status. Data shown is live and will change as the sensor changes. To view changes re-type the command. stp>Arinc429 Arinc429 Operating, Rx: Seeking, Low Rx Parity Errors: 0 Lbl 164 203 320 Arinc735 Functn RadAlt BarAlt MagHead Chn ------- Ssm ------- Value ---------------- Displays the ARINC-735 alternate display type and status.
PAGE 43
SKY497 Installation Manual Commands Descriptions Cal (help) Calibrates the antenna to the system (includes cables, connectors, and TRC497). Cal: Performs system calibration. stp>cal Asking for current calibration value. Starting calibration. Please Wait... Re-Calibration Successful! Old Cal Value: 283 degrees New Cal Value: 273 degrees Cal help: Config Displays the command specific help message.
PAGE 44
SKY497 Installation Manual Commands Descriptions Dump (help) Displays the error messages stored in the error log. If no errors are stored in the system log, the message NO FAULTS DETECTED is displayed. Dump help: Displays command specific help message. Displays system error log.
PAGE 45
SKY497 Installation Manual Commands Descriptions Help or ? The help or ? command displays a list of available commands. Executing the Help command displays the following list. stp>? ? .................... Command help Arinc429 ............. Arinc 429 cmds Arinc735 ............. Arinc 735 cmds Bar .................. Displays barometric altitude Cal .................. Executes antenna calibration Config ............... SKY497 Config Options Dump ................. Displays the List of Logged Errors Ground .
PAGE 46
SKY497 Installation Manual Commands Descriptions Sensors (help) Displays the current source and value for the heading, barometric altitude, and radio altitude. Sensors help: Displays command specific help message. Sensors: Displays current sensor status.
PAGE 47
SKY497 Installation Manual APPENDIX E Installation Checkout Using an Alternate Display E.1 INTRODUCTION This section contains installation checkout procedures for the SKY497 that is interfaced to an alternate display (e.g., BFGoodrich Avionics Systems RGC250). NOTES 1. This section provides checkout information for the BFGoodrich Avionics Systems SKY497 interfaced to an Alternate Display. When interfacing to an alternate display the TRC497 must have software version 1.4 or above. 2.
PAGE 48
SKY497 Installation Manual NOTE After power up, it may take a couple of minutes for the altitude encoder to return a valid altitude to the transponder and SKY497. 3. Turn SKY497 ON. After approximately thirty seconds the display will show the standby screen. NOTE If the TRC has not been calibrated to the directional antenna, the display may show a FAIL message. Calibrate the system (see step 4 below). 4. At the terminal device, type Cal . Verify the Re-Calibration Successful! is displayed. 5.
PAGE 49
SKY497 Installation Manual NOTE The Patch Antenna may be used without a tripod. The Patch Antenna can be held, or secured, and pointed towards the SKYWATCH aircraft under test WITH THE MOUNTING STUD POINT TOWARD THE GROUND . This orientation is critical. b. Mount the chassis lid, with the Patch Antenna facing the aircraft, onto a tripod (not included). The tripod must be capable of holding the antenna (approximately 2.5 lb) and must provide a standard base mounting stud threaded 1/4"-20.
PAGE 50
SKY497 Installation Manual 16. From each test point (see step 13): a. Position the TT391 Patch Antenna facing the SKYWATCH aircraft under test. b. Set the TT391 POWER switch to the ON position. c. Verify that the display shows, in the direction (± 30 degrees) of the TT391, two targets; a Traffic Advisory (i.e., a solid circle) at ¼ nm and Other Traffic (i.e., open diamond ) at 4.5 nm. Both targets will be displayed in level flight at own aircraft altitude (i.e.
PAGE 51
SKY497 Installation Manual E.3.1 Self Test 1. Turn SKYWATCH OFF and then: a. Make sure the aircraft's transponder is in the STANDBY, ON, or ALT mode. NOTE After power up, it may take a couple of minutes for the altitude encoder to return a valid altitude to the transponder and SKY497. b. If installed, power up the radio altimeter. c. Make sure all compass/HSI flags are cleared from the aircraft's instruments. 2. Turn SKYWATCH ON. 3.
PAGE 52
SKY497 Installation Manual This page intentionally left blank. E-6 Rev.