066-4010-10

BendixKing KNS 81 navigation system 066-4010-10

066-4010-10 is the exact Part Number of this BendixKing KNS 81 panel-mounted navigation system. The unit combines VOR and localizer reception, an RNAV computer and glideslope reception in one cockpit control and display assembly. Its front panel gives the crew a numerical navigation display together with waypoint, return, radial, check and data controls used to establish and review the selected navigation solution.

The KNS 81 is designed to work as part of an approved aircraft navigation installation rather than as a stand-alone position source. It receives radio-navigation information and, for RNAV operation, depends on valid distance data from compatible aircraft equipment. The full -10 suffix is important because KNS 81 variants can differ in lighting, display lens, glideslope provision and optional interface configuration. Purchase or replacement approval must therefore be based on Part Number 066-4010-10, not on the KNS 81 model name alone.

VOR, localizer and glideslope functions

In a conventional VOR installation, the system receives the selected station and provides bearing or radial-related information for the aircraft navigation presentation. Localizer reception supports lateral guidance toward a published runway centerline when the connected antenna, installation and indicators are approved for that operation. The identification plate on the photographed unit marks the configuration for VOR, LOC, RNAV and GS functions.

The glideslope receiver supplies vertical approach information to a compatible course-deviation or navigation indicator. The KNS 81 front display does not replace the approved external indicator used by the pilot for lateral and vertical deviation. Valid operation depends on antenna condition, coaxial wiring, power, associated indicators and correct signal routing. Warning or invalid indications must be interpreted according to the aircraft flight manual supplement and the applicable Bendix/King operating instructions.

RNAV operation and distance-data interface

The RNAV computer allows the crew to define and use waypoint information relative to a suitable radio-navigation source. A typical installation chain is navigation antenna → KNS 81 VOR/localizer receiver and RNAV computer → compatible cockpit indicator. Distance information is supplied by separate compatible DME or TACAN-related equipment when required by the approved installation; the KNS 81 itself does not contain the DME transmitter and distance-measuring section found in some other systems.

Because the distance source is external, the exact DME interface, switching and annunciation must be confirmed from the aircraft wiring diagram. Units such as the KN 63, KDM 706 or KTU 709 may be encountered in documented KNS 81 installations, but these are related components and are not interchangeable with 066-4010-10. Their presence in an aircraft is not automatic proof that every KNS 81 suffix is approved. The equipment list and installation data remain controlling.

Identification, power and installation checks

The authentic rear photograph shows the exact 066-4010-10 identification plate and the long panel-mount chassis. The plate states 14/28 VDC input, current values of 1.3/0.6 A and a unit weight of 5.0 lb. These markings belong to the photographed -10 configuration and are more reliable for receiving inspection than values copied from a visually similar KNS 81 suffix.

Before installation, compare the full Part Number, model, serial number, modification marks, front display, controls, rear connector arrangement, coaxial connections, housing and mounting provisions. Bench testing should cover display segments, controls, VOR/localizer reception, glideslope output, RNAV calculation, waypoint functions, flags, lighting and each approved external interface. Connector pin assignments and adjustment procedures must come from current maintenance data for the exact configuration.

Overhauled supply and ordering information

This 066-4010-10 KNS 81 is offered in Overhauled condition from partner stock with a six-month warranty. The quotation will identify the allocated serial number, release documentation, test status and accessories included with the particular unit. A mounting rack, connector kit, DME equipment, antennas, indicators and installation hardware are included only when expressly listed in the quotation.

For an inquiry, specify Part Number 066-4010-10, model KNS 81, aircraft type, supply voltage, existing navigation and distance-measuring equipment, required documentation and quantity. Related avionics can be reviewed in the Garmin / BendixKing / Honeywell / Collins category. Final airworthiness, installation eligibility and interchangeability must be established from approved aircraft and system documentation.

Product Type: Panel-mounted RNAV navigation system

Manufacturer: BendixKing / Honeywell

Model: KNS 81

Designation: 066-4010-10

Alternative Designations: KNS81; KNS-81; 066401010; Bendix/King KNS 81

Main Function: VOR, localizer, RNAV and glideslope reception and navigation-data processing

Navigation Functions: VOR / LOC / RNAV / GS, as marked on the exact unit identification plate

RNAV Distance Source: Separate compatible DME or approved distance-data source required

DC Power Supply: 14/28 VDC, according to the exact unit identification plate

Current: 1.3/0.6 A, according to the exact unit identification plate

Unit Weight: 5.0 lb / approximately 2.27 kg, according to the exact unit identification plate

Mounting: Panel-mounted avionics chassis

Front Controls: Waypoint / mode control, USE, RTN, RAD, CHK, DATA, power / ident and RNAV data control

Associated Equipment: Compatible DME source, navigation indicator, antennas and aircraft switching interfaces

Typical Signal Chain: Navigation antenna and distance source → KNS 81 → compatible cockpit navigation indicator

Aircraft Applicability: Confirm from the aircraft equipment list and approved installation data

Interchangeability: Complete suffix, lighting, lens, glideslope and interface configuration must match

Condition: Overhauled

Warranty: 6 Months

Technical Documentation: Applicable Bendix/King KNS 81 installation, operation and maintenance data

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In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.