automatic anti-icing control unit
BA-137 Series 3
Price on request
automatic anti-icing control unit
Available on back-order
Description
BA-137 Series 3 automatic control unit
BA-137 Series 3 is an aircraft automatic control unit used in anti-icing and icing warning systems. The unit operates as part of onboard equipment installed on heavy transport aircraft, including Il-76 and Il-76MD configurations according to the supplied context. It processes signals from icing detection devices and controls related warning and heater circuits. The block belongs to aircraft technical property and is usually supplied as aviation spare equipment for maintenance, replacement or restoration of anti-icing system channels.
Function of BA-137 Series 3 in the anti-icing system
The main function of BA-137 Series 3 is to control elements of the aircraft anti-icing system based on signals from icing detectors. When icing is detected, the block processes the incoming signal and issues commands to the corresponding cockpit warning indication and detector heating circuit. This allows the crew to receive an immediate warning about icing in the engine inlet area and helps maintain detector operation by clearing ice from the sensing element. The unit works as a relay / logic block within the complete anti-icing control circuit.
Operation with DO-206 and SPD-45-3 devices
BA-137 Series 3 is described in connection with DO-206 Series 2 icing detectors and SPD-45-3 differential pressure signalizers. In the supplied context, when ice blocks the openings of the DO-206 detector, a contact closes and the signal is sent to terminal No. 1 of the BA-137 block. The unit then energizes the heating element of the DO-206 detector and turns on the cockpit “Icing” / “Inlet Guide Vane Icing” warning indication. After the detector is cleared and the contact opens, the block switches off the circuits after a timed delay.
Timed delay logic of BA-137 Series 3
A characteristic function of BA-137 Series 3 is delayed switch-off after icing signal removal. According to the source context, after ice is removed from the detector sensing area and the detector contact opens, the BA-137 block does not immediately switch off the heater and warning indication. Instead, it keeps the circuit active for a fixed delay of approximately five seconds. This logic helps ensure that remaining ice fragments are cleared from the detector before the anti-icing signal and heater command are removed.
Installation and system integration on Il-76
In the supplied context, BA-137 Series 3 is installed in the technical compartment / radio equipment compartment of the Il-76 fuselage, on equipment racks together with other electrical and thermal control units. It works with engine icing detectors, detector heater circuits, cockpit warning lamps, anti-icing control panels and, depending on system configuration, flight data recording circuits. The number of blocks installed on board may correspond to the number of monitored engine channels. Exact location and quantity must be verified by aircraft documentation.
Identification and ordering of BA-137 Series 3
Before ordering BA-137 Series 3, the buyer should confirm the aircraft type, anti-icing system configuration, associated detector type, required series and documentation set. It is also important to clarify whether the request concerns BA-137 Series 3 specifically, BA-137-2S or another BA-137 modification. The unit may be required for Il-76 anti-icing system maintenance, replacement of a defective automation block, repair stock or restoration of aircraft electrical equipment. Passport, label data, series, storage condition and test records should be checked before shipment.
Details
Product Type: Automatic control unit / aircraft anti-icing automation block
Designation: BA-137 Series 3
Russian Designation: БА-137 серия 3
Alternative Designations: BA-137 3rd Series, БА-137 3-й серии, BA-137, БА-137
Related Designations: BA-137-2S, БА-137-2С, BA-137 Series 2, БА-137 2-й серии
Function: Control of anti-icing system elements and processing of icing detector signals
Application / Where Used: Aircraft anti-icing and icing warning systems
System / Installation Area: Engine and air intake icing detection / anti-icing control circuits
Compatible Aircraft / Equipment: Il-76 family aircraft, including Il-76MD according to source context and documentation
Associated Engines: D-30KP engines according to source context
Associated Icing Detector: DO-206 Series 2 icing detector
Associated Signalizer: SPD-45-3 differential pressure signalizer
Associated Warning Indication: Cockpit “Icing” / “Inlet Guide Vane Icing” warning annunciator
Nominal Supply Voltage: 27 V DC
Input Signal Type: Discrete signal from icing detector / differential pressure signalizer circuit
Signal Input Reference: Terminal No. 1 of BA-137 block, according to source context
Output Circuits: Detector heater power supply and cockpit icing warning indication
Delay-Off Time: 5 seconds according to source context
Installation Location: Technical compartment / radio equipment compartment on aircraft equipment racks, according to source context
Associated Equipment: DO-206 heater, anti-icing warning lamps, anti-icing control equipment, SOT-1M, EP-309T and flight data recording system circuits depending on aircraft configuration
Housing: Metal aviation block-type casing with plug connector
Connection Type: Quick-release aviation plug connector
Category: Aircraft electrical automation equipment / anti-icing system component
Market Condition Context: New Equipment / As-Stored, overhauled or serviceable depending on availability
Technical Documentation: Product passport, label, aircraft maintenance documentation, anti-icing system wiring diagram, test records and repair documents if available
Payment & delivery
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.
- Description
- Details
- Payment & delivery
BA-137 Series 3 automatic control unit
BA-137 Series 3 is an aircraft automatic control unit used in anti-icing and icing warning systems. The unit operates as part of onboard equipment installed on heavy transport aircraft, including Il-76 and Il-76MD configurations according to the supplied context. It processes signals from icing detection devices and controls related warning and heater circuits. The block belongs to aircraft technical property and is usually supplied as aviation spare equipment for maintenance, replacement or restoration of anti-icing system channels.
Function of BA-137 Series 3 in the anti-icing system
The main function of BA-137 Series 3 is to control elements of the aircraft anti-icing system based on signals from icing detectors. When icing is detected, the block processes the incoming signal and issues commands to the corresponding cockpit warning indication and detector heating circuit. This allows the crew to receive an immediate warning about icing in the engine inlet area and helps maintain detector operation by clearing ice from the sensing element. The unit works as a relay / logic block within the complete anti-icing control circuit.
Operation with DO-206 and SPD-45-3 devices
BA-137 Series 3 is described in connection with DO-206 Series 2 icing detectors and SPD-45-3 differential pressure signalizers. In the supplied context, when ice blocks the openings of the DO-206 detector, a contact closes and the signal is sent to terminal No. 1 of the BA-137 block. The unit then energizes the heating element of the DO-206 detector and turns on the cockpit “Icing” / “Inlet Guide Vane Icing” warning indication. After the detector is cleared and the contact opens, the block switches off the circuits after a timed delay.
Timed delay logic of BA-137 Series 3
A characteristic function of BA-137 Series 3 is delayed switch-off after icing signal removal. According to the source context, after ice is removed from the detector sensing area and the detector contact opens, the BA-137 block does not immediately switch off the heater and warning indication. Instead, it keeps the circuit active for a fixed delay of approximately five seconds. This logic helps ensure that remaining ice fragments are cleared from the detector before the anti-icing signal and heater command are removed.
Installation and system integration on Il-76
In the supplied context, BA-137 Series 3 is installed in the technical compartment / radio equipment compartment of the Il-76 fuselage, on equipment racks together with other electrical and thermal control units. It works with engine icing detectors, detector heater circuits, cockpit warning lamps, anti-icing control panels and, depending on system configuration, flight data recording circuits. The number of blocks installed on board may correspond to the number of monitored engine channels. Exact location and quantity must be verified by aircraft documentation.
Identification and ordering of BA-137 Series 3
Before ordering BA-137 Series 3, the buyer should confirm the aircraft type, anti-icing system configuration, associated detector type, required series and documentation set. It is also important to clarify whether the request concerns BA-137 Series 3 specifically, BA-137-2S or another BA-137 modification. The unit may be required for Il-76 anti-icing system maintenance, replacement of a defective automation block, repair stock or restoration of aircraft electrical equipment. Passport, label data, series, storage condition and test records should be checked before shipment.
Product Type: Automatic control unit / aircraft anti-icing automation block
Designation: BA-137 Series 3
Russian Designation: БА-137 серия 3
Alternative Designations: BA-137 3rd Series, БА-137 3-й серии, BA-137, БА-137
Related Designations: BA-137-2S, БА-137-2С, BA-137 Series 2, БА-137 2-й серии
Function: Control of anti-icing system elements and processing of icing detector signals
Application / Where Used: Aircraft anti-icing and icing warning systems
System / Installation Area: Engine and air intake icing detection / anti-icing control circuits
Compatible Aircraft / Equipment: Il-76 family aircraft, including Il-76MD according to source context and documentation
Associated Engines: D-30KP engines according to source context
Associated Icing Detector: DO-206 Series 2 icing detector
Associated Signalizer: SPD-45-3 differential pressure signalizer
Associated Warning Indication: Cockpit “Icing” / “Inlet Guide Vane Icing” warning annunciator
Nominal Supply Voltage: 27 V DC
Input Signal Type: Discrete signal from icing detector / differential pressure signalizer circuit
Signal Input Reference: Terminal No. 1 of BA-137 block, according to source context
Output Circuits: Detector heater power supply and cockpit icing warning indication
Delay-Off Time: 5 seconds according to source context
Installation Location: Technical compartment / radio equipment compartment on aircraft equipment racks, according to source context
Associated Equipment: DO-206 heater, anti-icing warning lamps, anti-icing control equipment, SOT-1M, EP-309T and flight data recording system circuits depending on aircraft configuration
Housing: Metal aviation block-type casing with plug connector
Connection Type: Quick-release aviation plug connector
Category: Aircraft electrical automation equipment / anti-icing system component
Market Condition Context: New Equipment / As-Stored, overhauled or serviceable depending on availability
Technical Documentation: Product passport, label, aircraft maintenance documentation, anti-icing system wiring diagram, test records and repair documents if available
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.