Warning: Use of non-aviation approved cellular telephone equipment may be prohibited by regulation. Honeywell, Inc. is not responsible for unauthorized airborne use of cellular telephones. There are two unswitched inputs, for autopilot disconnect, and/or radar altimeter warning. Push buttons select the receiver audio source provided to the headphones. A SPR button allows the user to listen to the receiver(s) selected on the cabin speaker.
Joint Airworthiness Authorities under JTSO C50C and JAR-TSO 2C35d. The TSO holder and manufacturer is PS Engineering, Incorporated, Lenoir City Tenn., USA. The KMA28 complies with relevant portions of EUROCAE RTCA MPS WG No. 7/70, DO-143 and (Marker Beacon Receivers), ED-14C/DO-160C (Environmental Conditions...
28 VDC: Receiver Inputs: Unswitched Inputs: Transmitter Selections: Speaker Impedance: Headphone Impedance: Headphone Output: Microphone Impedance: 006-10565-0000 Bendix/King KMA28 TSO COMPLIANCE C35d, Class A C50c, Class A RTCA/DO-214 RTCA/DO-143 RTCA/DO-160C RTCA/DO-178B A1D1/CA(MN)XXXXXXBBBBTBKXX -15º C to +55ºC -55º C to +85ºC Up to 50,000 feet in an non-pressurized area of the cockpit.
Do NOT return units damaged in shipping to Honeywell. If the unit or accessories shows any sign of external shipping damage, contact Honeywell to arrange for a replacement. Under no circumstances attempt to install a damaged unit in an aircraft.
Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.3.3 Mounting Rack Installation Set the unit aside in a safe location until needed. Install the tray using six FHP 6-32 x ½" screws. The audio selector panel must be supported at front and rear of the mounting tray.
Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver that you use insulated washers to isolate the ground return path from the airframe to all headphone and microphone jacks. 2.4.2 Existing KMA-24 Installation If the installation replaces a KMA-24 (series –00, -01, -02 or -03), the existing 44 pin connector can be used for the bottom connector of the KMA 28 tray as is, providing it is properly installed and wired.
Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.4.7 "Swap" Mode When a momentary, normally open, push-button switch is connected between pin 10 on the top connector and aircraft ground, the user can switch between Com 1 and 2 by de- pressing this switch without having to turn the mic selector switch. This yoke-mounted switch eliminates the need to remove your hands from the yoke to change transceivers.
Com 2 mic selector position, connect Com 3 audio in parallel to the AUX input (J1, pin 11). 2.4.12 Public Address function The KMA28 has a Public Address function. By connecting the top connector (J2), Pin 18 to ground, the pilot’s microphone audio is placed on the cabin speaker output. When the 006-10565-0000 Page 2-5 Rev.
The marker beacon receiver is included in the KMA 28. 2.5.1 Middle Marker Sense A Middle Marker sense output signal is available from the KMA28 to flight control sys- tems. This function will not operate during the test mode. This output will go to +4.7 VDC ( 0.5 VDC) when a valid Middle Marker signal is received.
It is probable that radio interference will occur in the split mode when the frequencies of the two aircraft radios are adjacent, and/or the antennas are physically close to- gether. Honeywell makes no expressed or implied warranties regarding the suitability of the KMA 28 in Split Mode.
Unauthorized use of cellular telephone devices in aircraft is subject to FCC enforcement action, which may include a $10,000 fine per incident. Honeywell, Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes no responsibility for the user’s action.
Aircraft Power 11-33 VDC Ext. Marker Audio In Pilot Mic Key Cabin Spkr Lo Aircraft Ground 006-10565-0000 Bendix/King KMA28 J2 Top Connector Pilot Phone Audio Hi (Left) AUX Control Out Copilot Phone Audio (Lt) Copilot Phone Audio Lo Copilot Phone Audio (Rt)
14. Verify proper Intercom system operation in the A ble 3-1). 006-10565-0000 Bendix/King KMA28 2 button causes the button to illuminate, and the Com 2 1/2 position. Verify that the pilot commu- 2/1 position. Verify that the pilot commu- position. Verify that the pilot headset is...
3. Connect the marker antenna and verify proper operation. 2.11.2 Receiver Sensitivity Although the KMA28 meets FAA TSO-C35d sensitivity specifications, the sensitivity of the receiver has been adjusted to meet real world requirements (150 V and 430 V, soft). This will usually eliminate the need for the avionics shop to reduce the sensitivity in the field so as to prevent early detection of the marker beacons.
"out" position and remove that receiver from the audio. 188.8.131.52 Key “click” The KMA28 is equipped with an electronic “click” to provide additional feedback for button operation. To activate the key click, push and hold BOTH COM 1 and COM 2 re- ceiver buttons for five seconds, and release.
Turning the rotary switch to the C place pilot and copilot on Com 2. The KMA28 gives priority to the pilot’s PTT. If the copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard over the selected com transmitter.
“transmit interlock” system, the split mode may not work properly unless the interlock feature is disabled. Honeywell makes no expressed or implied guarantee regarding the suitability of Split Mode in a given installation. Note: Split Mode does not turn off other (Nav, ADF, etc.) selected audio to pilot. However, the copilot will only hear the selected communications receiver and unswitched audio.
Unauthorized use of cellular telephone devices in aircraft is subject to FCC enforcement action, which may include a $10,000 fine per incident. Honeywell , Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes no responsibility for the user’s action.
184.108.40.206 Mono headsets in Stereo Installation All passenger headsets are connected in parallel. Therefore, if a monaural headset is plugged in to a Stereo KMA28 installation, one channel will be shorted. Although no damage to the unit will occur, all passengers will lose one channel.
220.127.116.11 Entertainment Input The audio selector panel has provisions for two separate entertainment input devices. They operate independently in the KMA28. The volume control does not affect music level. While in the ISO (Isolate) mode, the copilot will hear Entertainment 1 while the four pas- sengers will hear Entertainment #2.
Each intercom position has a "hook switch." The pilot's hook switch is the "TEL" mode on the mic selector, the others are individual switches mounted adjacent to the headset jacks. 006-10565-0000 Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver Passenger Hears Passenger and Copilot intercom...
In ISO intercom mode, when the KMA28 is in the TEL mode, the pilot position is in the "Phone Booth." Only the pilot will hear the telephone, and only he will be heard. He will also have access to Com 1, and will transmit on that radio using the PTT.
Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 6.21 in Top View 7.48 in 5.94 in 6.28 1.35 1.25 Figure 4-2 Unit External Dimensions in inches 006-10565-0000 Appendix Rev. 0, Sept. 00...
Reserved Note 3 Reserved Reserved Reserved Note 11 Control Output 006-10565-0000 Bendix/King KMA28 Pass. 1 PhonesJack Pass. 1 Mic Jack Pass. 2 Mic Jack Pass. 3 Mic Jack Pass. 4 Mic Jack Copilot Mic Jack Ent. #1 Input Notes: 1. Pin C is reserved 2.
Powerplant, Propeller, or Appliance) In the case of the KMA 28, you may use the following text as a guide. Installed audio selector and 6-place intercom, Honeywell KMA 28, part number 066-01176- (XXXX) in ( location ) at station strument Panel Mounting).
Appendix E RTCA DO160C (EUROCAE ED-14) Environmental Qualification Form Audio Selector Panel/Intercom/Marker Beacon Receiver Part Number: 7000M-S FAA TSO Number: C50c, C35d Class A, JTSO 2C35d and JTSO C50c Manufacturer: PS Engineering Incorporated 9800 Martel Road Conditions Temperature and Altitude Low Temperature High Temperature In-flight Loss of Cooling...