KRA 405B RADAR ALTIMETER INSTALLATION MANUAL REVISION HIGHLIGHTS 006-10536-0010 Rev. 10 Oct/2005 This is a full reprint of the KRA 405B Installation Manual. Discard the previous manual revision in its entirety. Specific changes to content are denoted by change bars. Revision highlight(s) include the updating the environmental qualification forms to revision AF.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL THIS PAGE IS RESERVED Page RH-2 006-10536-0010 Rev. 10 Oct/2005...
UNITS AND ACCESSORIES SUPPLIED (KRA 405B SYSTEM COMPONENTS) ... 1-9 A. RADAR ALTIMETER (Receiver/Transmitter) ... 1-9 B. RADAR ALTIMETER INDICATOR - Honeywell KNI 415 or KNI 416 ... 1-10 C. RADAR ALTIMETER ANTENNAS (2 each) ... 1-10 D. KRA 405B INSTALLATION KIT ... 1-10 E.
REMOVAL AND REPLACEMENT ... 2-22 A. KRA 405B RECEIVER/TRANSMITTER ... 2-22 B. KNI 415/416 INDICATOR ... 2-23 C. ANTENNAS ... 2-24 HONEYWELL MAINTENANCE RECOMMENDATIONS ... 2-24 GENERAL ... 3-1 NORMAL OPERATION ... 3-2 A. PREFLIGHT ... 3-2 B. TAXI ... 3-2 C.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL INTRODUCTION This manual contains information relative to the physical, mechanical, and electrical characteristics of the BENDIX/KING KRA 405B. Installation and operating procedures are also included. Information relative to the maintenance and procurement of replacement parts may be found in the KRA 405B Maintenance Manual Part Number 006-15536-00XX (XX = Highest Revision).
01/04, 02/04 or higher will not report negative values of altitude on the ARINC 429 digital bus unless expressly configured to do so. This feature is required for installations with Honeywell EFIS 40/ 50. One of these two unit versions (-0101 or -0202) must be used when interfacing the digital output of the KRA 405B to equipment which expect non-negative values.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL The KRA 405B Radar Altimeter System consists of the KRA 405B Receiver/ Transmitter, the KNI 415 or KNI 416 Indicator, and two (2) KA 54A Antennas. The entire system is solid state except for a servo mechanism and relay in the Indicator.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL KRA 405B RECEIVER/TRANSMITTER (cont.) ALTITUDE OUTPUT: Slope: Precision Equipment: Auxiliary Out #1: Auxiliary Out #2: (-0101, -2001/-4001) Auxiliary Out #2: (-0202) Analog Altitude: Arinc 429 Out: The following are serial digital outputs from the KRA 405B: LABEL INFORMATION CONTAINED IN LABEL Radio Height...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL KRA 405B RECEIVER/TRANSMITTER (cont.) Load Capability: Off Scale Voltage: Precision Equipment Output: Auxiliary Out #1: Auxiliary Out #2: Auxiliary Out #2: Time Constant: Precision Equipment Output: TRANSMITTER OUTPUT: Power: Center Frequency: Modulation Frequency: Primary: Secondary: TRANSMITTER OUTPUT: (cont.) FM Deviation P-P:...
Gaskets are included with a new antenna. They may be ordered separately as P/N 187-01753-0000. NOTE: The KA 54 Radar Altimeter Antenna is compatible with the KRA 405B and may be used in retrofit situations. However, this antenna is no longer available from the factory.
The default program can then be modified from View in the memory menu. Refer to sections 18.104.22.168, 22.214.171.124, and 126.96.36.199 of the KPA 900 operators guide (006- 05392-00XX). 006-10536-0010 Rev. 10 VENDOR PART NUMBER Honeywell Honeywell Honeywell 2.4 CONFIGURABLE Page 1-13 Oct/2005...
This equipment has been type accepted by the FCC and entered on their list of type accepted equipment as Honeywell KRA 405B and must be identified as Honeywell KRA 405B on your FCC Form 404, Aircraft Radio Station License Application.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL GENERAL INFORMATION This section contains general suggestions and information to consider before installation of the KRA 405B. Close adherence to these suggestions will assure optimum performance from the equipment. The conditions and tests required for the TSO and MOPS approval of this article are minimum performance standards.
Failure to provide cooling to the equipment will lead to increased avionics maintenance costs and may also void the Honeywell warranty. CONFIGURABLE PARAMETERS The installer may alter some of the operational characteristics of the KRA 405B by installing a CM 2000 Configuration Module that has been programmed with customized preferences.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL Use the cursor keys or the mouse to move the highlight bar to the parameter that is to be adjusted. FIGURE 2-1 KRA 405B DEFAULT TRIP POINT SETTINGS Press the <Enter> key to display the Editing Window for the selected Trip Point.
"clamp", so all unit configurations have the capability to produce negative results. The Honeywell EFIS 40 and EFIS 50 systems (and possibly other systems) will not display negative altitudes re- ceived on the digital bus. When the Honeywell EFIS detects a negative altitude value, it "declutters"...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL The KRA 405B has provisions to allow some flexibility in the altitude at which zero feet is displayed. This deviation would be useful for installations where a zero foot reading is desired before the landing gear compresses or when the antennas are mounted significantly forward of the main gear.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL NOTE: For CM 2000 Configuration Modules used in ART 2000 Weather Radar and KRA 405B Radar Altimeter Installations and CM 2000 configuration modules that have never been pro- grammed or may have a default program for a different unit, a "write to"...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL The selected mounting location will vary with each particular type of aircraft. The unit should be installed in a convenient location for accessibility for inspection and maintenance. The area should be free from excessive vibration, heat, and noise generating sources.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL For direct mounted units perform the following steps: Dual Installation The KRA 405B R/T fulfills all altitude accuracy specifications when in dual installation mode. Mutual interaction is not operationally significant. See ETER SYSTEM TYPICAL ANTENNA The secondary unit in a dual installation is selected by a hardware strap as described in Note 3 of RADAR ALTIMETER SYSTEM...
KA 54A S67-2002-4 KA 54 NOTE: Variances between the S67-2002 and S67-2002-4 are depicted in FIGURE 2-12 HONEYWELL GT 7003586 (SENSOR SYSTEMS TYPE S67-2002- ANTENNA). Refer to technical information. TABLE 2-1 TSO CERTIFIED ANTENNAS 006-10536-0010 Rev. 10 DRAWING. The unit may be mounted in 1.3 TECHNICAL...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL The UB Corporation, Sensor Systems, Dorne and Margolin (EDO) and Comant Industries antennas can be purchased directly from the respective manufacturers at the following addresses: UB Corporation 9829 Wilsky Blvd. Tampa, FL 33615 Telephone: 813-884-1463 Comant Industries, Inc.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL • Antennas should be pointing straight down within plus or minus 6° when the aircraft is in a level flight attitude. Antennas mounted more than 6° off the vertical will exhibit erratic op- eration on the ground. See TEM TYPICAL ANTENNA INSTALLATIONS installation.
Water between the antenna flange and aircraft skin will cause loss of system sensitivity and may cause peeking. • The connectors on the KA 54 antennas should be mounted perpen- dicular to a line drawn through the receive and transmit antennas for a given unit.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL • Avoid the use of right angle or bulkhead coax connectors. Volt- age standing wave ratios (VSWR) are greater on these types of connectors and therefore can cause problems. If bulkhead con- nectors must be used, then connectors such as Kings Electronics Inc.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL WIRING HARNESS FIGURE 2-14 CONNECTOR PIN LOCATIONS connector pin connections and the KNI 415/416 mating connector pin locations. Refer to INTERCONNECT as required. During preparation of the wiring harness, the following precautions should be acknowledged: •...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL To program the configuration module, a KPA 900 with software 222- 00366-0002 or greater is needed (See section 1.6. CONFIGURATION MODULE PROGRAMMER Follow the instructions in the KPA 900 operator’s manual (006-05392- 00XX) which is included in the KPA 900 Configuration Module Programmer Kit to perform the programming.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL FIGURE 2-4 KRA 405B POST INSTALLATION CALIBRATION SWITCH Verify proper on ground performance after the calibration is complete. For systems without a zero feet offset programmed into the configuration module, this will be an indication of zero feet plus or minus the system tolerance of two or three feet.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL A calibration in an excessively noisy environment will not be accepted by the KRA 405B. A post calibration altitude of thir- ty to one hundred feet indicates a failed calibration. If this condition occurs, the calibration must be completed in a dif- ferent location.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL It also ensures the absence of an RF leakage path allowing the 4.3 GHz transmitter output to bleed into the system’s receiv- er, thus bypassing the normal antenna-to-ground-to-antenna path while flying above 2,500 feet AGL. The following procedure duplicates a flight altitude greater than 2,500 feet AGL in order to find these RF leakage paths.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL Place a one (1) foot square or larger piece of the mi- crowave absorber over each KRA 405B Antenna. The KRA 405B should unlock and the Indicator pointer should drive clockwise behind the mask. NOTE: While keeping the Antennas covered with the microwave absorber, reconfirm that the self-test is operational...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL An antenna fault will be detected when its cable is ter- minated into a 50 ohm load and the indicator needle will stow behind the mask. Re-bond the antenna if the point- er is now stowed. If the indicator pointer still does not stow, this in- dicates an RF cable or connector problem.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL (3) Test Procedure Connect the test equipment as shown in 405B TEST EQUIPMENT installation. Adjust the variable attenuator to 0 dBm (this setting yields approximately 65 dBm loop loss). The KNI 415/ 416 should indicate 900 to 1100 feet. Slowly increase the variable attenuator until the KNI 415/416 pointer goes clockwise behind the mask.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL Simulated Altitude Test Procedure The Simulated Altitude Test Procedure is to be used by the installer to test associated systems that interface with the KRA 405B. In the Simulated Altitude Test Mode, all outputs of the KRA 405B operate normally, except that they are con- trolled by a test input voltage rather than altitude.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL Re-installation For Rack Mount, follow procedure outlined in step 1, For Shock Mount and Direct Mount, follow procedure out- lined in step 2, Re-attach mating cable to Cannon connector (P4051) on the front of the unit. Re-attach mating coaxial cables to XMIT (P4052) and RCVR (P4053) TNC connectors on the front of the unit.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL Re-attach mating cable to Cannon connector (P4151/ P4161) on the back of the unit. ANTENNAS (Refer to FIGURE 2-8 KA 54 ANTENNA OUTLINE AND MOUNTING DRAWING through FIGURE 2-12 HONEYWELL GT 7003586 (SENSOR SYSTEMS TYPE S67- 2002-4 ANTENNA)) Refer to section 2.5.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL FIGURE 2-8 KA 54 ANTENNA OUTLINE AND MOUNTING DRAWING DORNE MARGOLIN INC. TYPE DMPN 3-3/A, (Dwg No 155-05159-0000, R-1) Page 2-33 006-10536-0010 Rev. 10 Oct/2005...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL FIGURE 2-9 UBC TYPE AD 43013-1 AND COMANT TYPE 01-34-04531 ANTENNA OUTLINE AND MOUNTING DRAWING, (Dwg No 155-05166-0000, R-0) Page 2-35 006-10536-0010 Rev. 10 Oct/2005...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL FIGURE 2-10 DORNE MARGOLIN TYPE DMPN 3-4/A ANTENNA OUTLINE AND MOUNTING DIAGRAM, (Dwg No 155-05167-0000, R-2) Page 2-37 006-10536-0010 Rev. 10 Oct/2005...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL FIGURE 2-11 KA 54A ANTENNA (SENSOR SYSTEMS TYPE S67-2002 & DORNE AND MARGOLIN TYPE DMPN 19-2-1) OUTLINE AND MOUNTING DRAWING, (P/N 071-01501-0000, R-AE) Page 2-39 006-10536-0010 Rev. 10 Oct/2005...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL FIGURE 2-12 HONEYWELL GT 7003586 (SENSOR SYSTEMS TYPE S67-2002-4 ANTENNA) OUTLINE AND MOUNTING DRAWING Page 2-41 006-10536-0010 Rev. 10 Oct/2005...
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL NOTE: Proper operation of a Radar Altimeter System depends upon the VSWR of the antenna cable. Therefore, extreme care must be ex- ercised in assembling the TNC connector to the RG 393/U cable. Strict adherence to the above instructions will ensure a good VSWR of the antenna cables.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL GENERAL The KNI 415 and KNI 416 Radar Altimeter Indicators are shown in 1 KNI 415 CONTROL FUNCTIONS are discussed below. • Altitude Scale: The KNI 415 scale gives accurate altitude indications from -20 to +2000 feet.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL • DH Lamp: This lamp lights when the Decision Height is reached. The lamp can be turned off by pushing the lamp in. The lamp can be turned on again, when below the decision height, by depressing the lamp a second time. Once turned off, the DH lamp will be automatically armed upon climb out as the aircraft passes through the DH altitude.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL IN FLIGHT OPERATION At normal cruise altitudes above 2000 feet, the indicator pointer is behind the mask and the warning flag is hidden from view above 2,500 feet. A Flight Control System (FCS) warn is a failure warning signal to systems requiring accurate above ground level (AGL) altitude information.
KRA 405B RADAR ALTIMETER INSTALLATION MANUAL SELF-TEST DIAGNOSTICS SYMPTOM Altimeter does not indicate 50 ± 5 feet. Flag does not come into view, but indicated altitude is cor- rect. DH Lamp fails to light. The altimeter indicates 100 feet. The altimeter indicates 200 feet.