PU-1248 Series 2

PU-1248 Series 2 autopilot control panel

PU-1248 Series 2 is an aircraft cockpit control panel used as part of the AP-28 autopilot system family. The unit provides direct crew control, adjustment and command input for the automatic flight control system. It is applied on civil and military transport aircraft, including An-24 and An-26 aircraft, depending on the installed autopilot configuration. The panel is associated with AP-28, AP-28L1 and AP-28L1I systems and is used for controlling autopilot channels, flight stabilization and selected automatic flight functions.

Autopilot control function of PU-1248 Series 2

The PU-1248 Series 2 panel allows the crew to control aircraft motion relative to the longitudinal, lateral and vertical axes through the autopilot system. It supports engagement and management of pitch, roll and heading-related control channels, depending on the aircraft configuration. The panel does not operate as an independent autopilot computer; it is a cockpit command interface connected with the AP-28 automatic flight control equipment. Crew commands from the panel are transmitted to the autopilot system, where they are processed and converted into control actions.

Flight stabilization through PU-1248

The PU-1248 panel is used for maintaining selected flight parameters through the AP-28 system. These functions may include stabilization of barometric altitude, roll angle, pitch attitude and heading. The panel also allows the crew to enter manual corrections to the flight path and to monitor selected autopilot states. In operation, it helps the crew maintain a stable flight path during cruise, route following and other phases where autopilot use is permitted by aircraft procedures. Correct function depends on the autopilot channels, sensors, wiring and indication system.

PU-1248 interaction with AP-28 navigation modes

In AP-28 family installations, the PU-1248 panel can support automatic flight modes connected with route guidance and navigation. These may include automatic flight along orthodromic and loxodromic tracks and automatic turns up to specified angles, depending on the aircraft system configuration. The panel provides the crew with manual control elements for changing flight parameters and selecting channels or modes. Since navigation and autopilot equipment can differ between An-24, An-26 and related aircraft, mode availability should always be confirmed through the aircraft documentation.

Panel design and cockpit installation

PU-1248 Series 2 is designed as an aircraft cockpit panel for installation in the central console or instrument panel area. The unit is built as a compact monoblock and includes electromechanical controls for manual correction and autopilot channel operation. Typical panel elements include the “Turn” rotary control, the “Descent-Climb” rotary control, channel engagement buttons or switches and light annunciators for mode and fault indication. The panel housing is intended for operation in aircraft cockpit conditions, including vibration, temperature variation and long-term service use.

Identification and ordering of PU-1248 Series 2

PU-1248 Series 2 may be supplied in different versions depending on the associated AP-28 autopilot modification. PU-1248D Series 2 is associated with the AP-28L1 system, while PU-1248E Series 2 is associated with the AP-28L1I system. Before ordering, the aircraft type, autopilot version, exact panel index, required condition, connector configuration and documentation set should be confirmed. The unit may be required for operational replacement, overhaul support, cockpit restoration or spare parts stock for An-24 / An-26 aircraft maintenance.

Product Type: Aircraft autopilot control panel / cockpit control unit
Designation: PU-1248 Series 2
Alternative Designations: ПУ-1248 серия 2, PU-1248D Series 2, PU-1248E Series 2, ПУ-1248Д с. 2, ПУ-1248Э с. 2
Function: Control, adjustment and command input for AP-28 automatic flight control system
Application / Where Used: AP-28 autopilot system family
System / Installation Area: Cockpit central console or instrument panel / aircraft automatic flight control system
Compatible Aircraft / Equipment: An-24, An-26 and other aircraft equipped with compatible AP-28 autopilot systems
Associated Systems: AP-28, AP-28L1, AP-28L1I autopilot systems
Version Reference: PU-1248D Series 2 for AP-28L1; PU-1248E Series 2 for AP-28L1I
Control Axes / Channels: Roll, pitch, heading and related autopilot channels depending on aircraft configuration
Main Functions: Autopilot channel engagement, flight stabilization, manual trajectory correction, altitude stabilization, heading / course control and fault indication
Navigation Functions: Automatic flight along orthodromic and loxodromic routes; automatic turns up to 120° where supported by system configuration
DC Power Supply: 27 V DC aircraft onboard network
AC Power Supply: 36 V, 400 Hz for autopilot sensor and synchronous circuits where applicable
Panel Controls: “Turn” rotary control, “Descent-Climb” rotary control, channel engagement buttons / switches
Indication: Light annunciators for autopilot modes, altitude stabilization and fault / trim-related warnings depending on version
Housing Design: Dust- and splash-protected monoblock cockpit panel
Operating Temperature Range: −60 °C to +60 °C
Vibration Resistance: Designed for turboprop aircraft cockpit operating conditions
Approximate Weight: 1.5–2.2 kg depending on version and cable configuration
Installation: Central console or cockpit instrument panel according to aircraft documentation
Condition: New / As-Stored / Overhauled / Serviceable, depending on availability
Technical Documentation: Product passport, AP-28 system documentation, aircraft maintenance documentation, wiring diagram and test records if available

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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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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.