Model: KA-131

BendixKing - Radio Altimeter Antenna
Part Number :

  • Radar altimeter antenna used in KRA-10/10A Radar Altimeter System
  • Available in standard configuration designed to be mounted on a metal surface where front to back angle is parallel with the ground within +/-6 degrees during level flight(see table below)
  • Available in skewed configuration designed to be mounted on a metal surface where the front to back angle is parallel with the ground within 6 to 20 degrees during level flight (see table below)
Size: 5.06"W x 2.66"H x 6.06"L Weight: 0.9 lbs.
Altitude: 45000 feet Temperature: -55 to +71C
Beamwidth: E-Plane= 40 +-5 deg. ; H-Plane= 40 +-5 deg. Side Lobe: 20dB down
Gain Above Isotropic: 10.5dB minimum Polarization: Linear
Input Impedance: 50 ohm nominal Skew: 0-6 deg. (-00 unit); 6-20 deg. (-01 unit)
Part NumberRadar Altimeter Antenna Description:
071-1114-00 Standard configuration
071-1114-01 Skewed configuration


- Radio Altimeter Antenna

NSN: 5985-01-356-0653

Price Condition Delivery

SEA Repair Capabilities: Yes

- Radio Altimeter Antenna
Price Condition Delivery

SEA Repair Capabilities: Yes

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

The coaxial cable connected to the KA-131 is fitted and matched at the original time of manufacturing.  The cable and antenna are aligned as a single unit for minimum SWR. A tag stating this requirement is attached to the antenna however it may become detached at some point in the life cycle of the antenna. A label was placed on the antenna as well stating to not alter the cable. The cable is safety wired onto the antenna to further prevent someone from removing the cable from the antenna.  Please see images for refernence.


None, they represent the same unit. Original King Radio part numbers were 9 digits. For example, 066-3056-01. During the Bendix and King merger (i.e. Bendix/King), a new part numbering system was created that converted these 9 digit part numbers to 12 digits. Therefore, 066-3056-01 became 066-03056-0001. Despite this numbering change, units that were originally from the King Radio design still have the 9 digit part number format on the unit dataplate. The 12 digit format for King units appears to be used for catalog and internal Honeywell purposes only. Therefore, any unit that has a zero in its third to last number (i.e. XXX-XXXX-X0XX) has a 9 digit part number (i.e. XXX-XXXX-XXX) on its dataplate / ID Plate.
In January 1989 Bendix/King changed from a nine digit to a twelve digit part numbering system. The new, larger 12 digit numbers allowed for the inclusion of software version into the last two digits of the part number for certain units in which software changed frequently such as EFIS and TCAS processors. Therefore, the two digits immediately preceding the software version indicate the hardware version of the unit.

Different software versions imply different operational features and/or interface capabilities and software modifications imply software repairs (bug fixes) to insure proper operation of these features and interfaces. Software version upgrades frequently require hardware modifications to the unit. Such hardware modifications accompanying software version upgrades do not necessarily change the hardware version of the unit.