SK 2.216.219-02

SK 2.216.219-02 course selector in the Kurs MP-70 system

The SK 2.216.219-02 is an aircraft course selector used as a cockpit control unit in the Kurs MP-70 navigation and landing system. It allows the crew to set the required course angle for radio navigation and approach operations. The selector is not a receiver and does not process radio signals by itself. Its task is to provide a precise manual course input to the onboard navigation equipment, where the selected value is used together with VOR or ILS data for indication and flight guidance.

Manual course setting through SK 2.216.219-02

During operation, the pilot sets the desired course angle using the selector controls. The selected value is shown on a mechanical digital counter, which gives a clear cockpit reference without relying only on an external indicator. The selector works across the full course circle and allows setting in one-degree steps. This is important for approach and navigation work, where the selected course must correspond to the required inbound or outbound track. A wrong or unstable course setting can lead to incorrect deviation indication in the connected system.

SK 2.216.219-02 in VOR and ILS modes

In the Kurs MP-70 system, the SK 2.216.219-02 is used for setting the desired course for VOR navigation and ILS approach operation. In VOR use, the selected course defines the reference radial or course line used by the navigation system. In ILS use, it helps align the selected approach course with the landing system indication. The unit does not replace the VOR or ILS receiver. It provides the course reference that the connected computing and indicating equipment uses when forming deviation information for the crew.

Signal output from the SK 2.216.219-02 selector

The SK 2.216.219-02 generates an electrical signal corresponding to the selected course angle. Depending on the aircraft configuration, this signal may be transmitted as a synchro or potentiometric output to onboard computing units and cockpit indicators. The quality of this output matters: if the selected course and transmitted signal do not match, the navigation indication may become inaccurate. During maintenance, the selector is usually checked not only by the counter reading, but also by signal output, contact stability, rotation smoothness and accuracy across the range.

Aircraft installation of SK 2.216.219-02

The selector is panel-mounted in the cockpit and fastened at four points. It is used on aircraft equipped with the Kurs MP-70 system, including transport and passenger aircraft such as Tu-154, Il-76 and Yak-42, depending on installed avionics. Since cockpit layouts and navigation equipment sets may differ, the unit should be checked against the aircraft parts catalog and Kurs MP-70 documentation before replacement. Similar selectors may look close in size and layout but differ in electrical output, accuracy or system compatibility.

Identification and supply of SK 2.216.219-02

In documentation and spare-parts requests, the unit may appear as SK 2.216.219-02 or in Cyrillic as СК 2.216.219-02. For supply, the full designation should be used together with the aircraft type and the required condition of the unit. It is also important to clarify whether the request is for the course selector only or for a larger Kurs MP-70 control set. Before installation, the condition of the counter, controls, mounting points, connector, output signal and technical documentation should be checked.

Product Type: Course selector / control unit
Designation: SK 2.216.219-02
Cyrillic Designation: СК 2.216.219-02
Function: Manual setting of desired course angle / ZPU
Application / Where Used: Aircraft navigation and landing systems
System / Installation Area: Kurs MP-70 onboard navigation and landing system
Compatible Aircraft / Equipment: Aircraft equipped with Kurs MP-70, including Tu-154, Il-76 and Yak-42 depending on configuration
Supported Navigation Modes: VOR navigation and ILS approach operation
Course Setting Range: 0 to 359°
Adjustment Resolution: 1°
Indication Type: Mechanical digital counter, drum type
Accuracy, ILS Channel: Not more than 0.45 to 0.7°
Accuracy, VOR Channel: Not more than 1.5 to 2°
Operating Voltage: 27 V DC
Signal Output Type: Synchro or potentiometric output to onboard computer and indicators, depending on configuration
Mounting: Panel-mounted, 4-point fastening
Weight: Approximately 0.5 to 0.7 kg
Condition: As applicable
Technical Documentation: Product passport and technical documentation

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