066-1072-04

BendixKing KR 87 receiver 066-1072-04

066-1072-04 is the exact Part Number shown on this BendixKing KR 87 automatic direction finder receiver. The panel-mounted unit provides the crew interface for tuning and operating a compatible ADF installation. Its front panel combines an electronic frequency display with ADF, BFO, frequency-transfer, flight-time or elapsed-time and set/reset controls. The receiver is not a complete installation by itself and requires approved antenna, bearing-indicator, wiring and aircraft interfaces.

The complete -04 suffix is essential for identification. KR 87 units can share the same model name and nearly identical bezels while differing in electrical configuration, lighting, modification status or installation approval. Part Number 066-1072-04 must be checked against the installed plate, connector, aircraft equipment list and approved wiring data. No operating voltage or interchangeability claim has been inferred from another KR 87 suffix.

ADF navigation and timer functions

In normal ADF operation, the receiver tunes a selected nondirectional radio beacon frequency and processes the received signal for use by a compatible bearing indicator. The bearing display points toward the station according to the approved installation and operating mode. ADF information remains subject to radio propagation, terrain, weather, coastal refraction, station serviceability and electrical interference, so it must be interpreted under the applicable flight procedures.

The BFO function supports reception of suitable unmodulated identification signals where operationally required. The dual display and FRQ transfer control let the crew manage active and standby frequency information. FLT/ET and SET/RST controls provide the installed timer functions. These convenience functions do not change the underlying ADF bearing system and should be checked separately during functional testing.

System composition and signal path

A representative chain is crew frequency selection at the KR 87 → receiver tuning and signal processing → approved loop and sense antenna system → selected NDB transmission → processed bearing output → compatible cockpit ADF indicator. Audio identification is routed through the aircraft audio system where configured. Exact companion-unit models, connector pins and signal formats must be confirmed from the aircraft wiring diagram rather than selected by appearance.

A loss of bearing can originate in the receiver, antenna, antenna cable, bearing indicator, audio path, power, wiring or external station conditions. The receiver should therefore be tested as part of the full ADF installation. Related navigation products in the same catalog category may operate in the same aircraft but are not automatically interchangeable or included with this unit.

Exact plate, installation and inspection

The authentic identification photograph shows the KR 87 ADF Receiver designation, Part Number 066-1072-04, serial number 60576, TSO C41c and DO-160 references, and Singapore manufacture marking. Those details belong to the photographed -04 unit. Exact dimensions, weight, current consumption, lighting supply and environmental category should be verified from the approved data for this specific Part Number before installation.

Receiving inspection should compare the complete plate, serial number, bezel, display window, knobs, keys, mounting features, connector condition and overhaul documentation. Bench and aircraft testing should cover power-up, active and standby frequency display, transfer function, ADF mode, BFO, timer functions, dimming, audio identification and valid bearing output through compatible equipment. Any test must follow current approved maintenance data and use suitable radio test equipment.

Overhauled supply and ordering information

This 066-1072-04 KR 87 is offered in Overhauled condition from partner stock with a six-month warranty. The quotation will identify the allocated serial number, overhaul organization, release certificate, bench-test status and included accessories. A mounting tray, connector, antenna, bearing indicator, audio interface, wiring and installation hardware are supplied only when expressly listed.

For an inquiry, specify Part Number 066-1072-04, model KR 87, aircraft type, installed indicator and antenna configuration, supply and lighting requirements, connector or tray requirement, quantity and required certification. Related avionics can be reviewed in the Garmin / BendixKing / Honeywell / Collins category. Final eligibility and interchangeability must be established through the aircraft equipment list and approved installation data.

Maintenance records should retain the exact suffix and modification status because a model-only entry can obscure configuration differences during later replacement or troubleshooting.

Product Type: Panel-mounted automatic direction finder receiver

Manufacturer: BendixKing / Honeywell

Historical Manufacturer Marking: AlliedSignal General Aviation Avionics

Model: KR 87

Designation: 066-1072-04

Alternative Designations: KR87; KR-87; 066107204; Bendix/King KR 87

Main Function: Tunes and processes NDB signals for compatible ADF bearing indication

Front Controls: ADF, BFO, FRQ transfer, FLT/ET and SET/RST

Display Functions: Active and standby frequency plus timer information according to installed mode

Typical Signal Chain: KR 87 tuning → loop and sense antenna → NDB signal → KR 87 processing → compatible bearing indicator and audio system

Associated Equipment: Approved ADF antenna, bearing indicator and audio interface required

Qualification Markings: TSO C41c and DO-160 according to the exact plate

Photographed Serial Number: 60576

Manufacturing Marking: Made in Singapore according to the exact plate

Exact Dimensions: Refer to the approved KR 87 installation drawing

Power and Lighting: Verify through approved data for Part Number 066-1072-04

Connector and Pin Assignment: Verify through the applicable KR 87 wiring data

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

Interchangeability: Complete suffix, supply, lighting, connector, modification status and approval must match

Condition: Overhauled

Warranty: 6 Months

Delivery Set: Tray, connector, antenna, indicator and wiring only when expressly included

Technical Documentation: Applicable BendixKing KR 87 installation, pilot and maintenance data

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

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

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

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.