065-00180-1400

Elevator-trim function in the control chain

In a compatible installation, the flight-control computer or manual electric-trim circuit generates a differential command for the servo. The KS 272C amplifier interprets command polarity and magnitude, controls motor direction and varies speed proportionally. When the clutch is engaged, motor torque passes through the approved mounting and slip-clutch arrangement into the aircraft trim linkage.

The servo is normally installed with a compatible KM 275 mount incorporating the mechanical slip-clutch interface. A simplified chain is flight-control computer or trim switch → aircraft wiring and protection → KS 272C motor, amplifier and clutch → KM 275 mount and linkage → elevator trim mechanism. The KM 275 and connected control units are related components, not part of this individual product unless a quotation states otherwise.

Proper operation depends on command input, clutch logic, supply voltage, travel limits, rigging and the condition of the aircraft trim mechanism. Slow movement, clutch slip, trim runaway or no movement can originate in switches, wiring, the controller, mount, linkage or servo. Troubleshooting should therefore follow the approved system procedure rather than replacing 065-00180-1400 solely on the basis of a cockpit symptom.

Electrical interfaces and 22 RPM configuration

Published KS 272C specifications list a +28 VDC supply with a 4 A rating. The command input range is −10 VDC to +10 VDC with an input impedance of at least 15 kΩ. Command polarity establishes travel direction, while command magnitude controls proportional motor speed. Exact pin assignments, grounding and circuit protection must be taken from the approved installation drawing.

Clutch engagement is documented through both a +28 VDC active-high input and a ground active-low input for the applicable interface. Listed outputs include a trim-voltage signal ranging from −28 VDC to +28 VDC and a trim-sense signal ranging from −3 VDC to +3 VDC. Those signals support the connected flight-control logic and test procedures; they should not be loaded or measured with an unapproved bench arrangement.

The exact 065-00180-1400 version is listed with an output speed of 22 RPM. For comparison, published family data identify 2.4 RPM for -0400, 14.6 RPM for -0600, 3.6 RPM for -2700 and 4.7 RPM for -3500. These differences reinforce the need to retain the full suffix and approved installation reference when ordering.

Installation, dimensions and identification

Published dimensions are approximately 3.925 inches wide, 4.675 inches high and 4.605 inches long, equivalent to about 99.7 × 118.7 × 117.0 mm. Published weight is approximately 2.1 lb, or 0.95 kg. Installation uses two AN3 bolts in the documented mounting arrangement, and the listed mating electrical connector is 030-03248-0000.

The servo housing, mounting holes, output interface, attached lead and original identification area should be inspected for impact damage, contamination, corrosion or unauthorised alteration. Installation should confirm connector security, electrical bonding where applicable, clutch operation, linkage travel and rigging. The unit must be tested through the approved KS 272C and aircraft procedure after fitment.

Receiving inspection should verify model KS 272C, exact Part Number 065-00180-1400, serial number, modification status, 22 RPM configuration, connector and mounting compatibility. Product photography identifies the correct component type and source page, but it does not guarantee that a later allocated serialised unit is the identical object shown unless the quotation expressly confirms that fact.

Serviceable partner-stock supply and ordering

This 065-00180-1400 KS 272C is offered in Serviceable condition from partner stock with a six-month warranty. Serviceable is the stated supply condition; exact serial number, tag date, release authority, repair history, included KM 275 mount, mating connector and other accessories remain subject to confirmation for the available unit. A servo should not be installed without the documentation required by the operator and regulatory environment.

For an inquiry, specify Part Number 065-00180-1400, model KS 272C, aircraft model and serial number, installed autopilot or flight-control system, required 22 RPM configuration, paperwork requirement and quantity. Related servos, computers and control equipment can be reviewed in the Garmin / BendixKing / Honeywell / Collins category. Related system products are not represented as interchangeable replacements.