4055А

4055A pump assembly in aircraft onboard systems

The 4055A is an aircraft pump assembly used as a specialized unit within onboard fluid systems of civil, transport or military aircraft. The exact system role depends on the aircraft configuration and the technical documentation for the specific item. In aviation supply practice, 4055A is treated as an aircraft technical item rather than a general industrial pump. It may be listed together with other fuel, oil or hydraulic units, but its final applicability should always be confirmed by the product passport, aircraft parts catalog, engine documentation or repair plant records.

Possible system role of the 4055A pump

The 4055A may be associated with aircraft systems where controlled movement of a working fluid is required. Depending on the installation, this may relate to fuel, oil, hydraulic or special service circuits. Since verified open technical data for this designation is limited, the pump should not be assigned to a specific aircraft system without documentary confirmation. For catalog and procurement purposes, it is safer to describe the 4055A as an aircraft pump assembly for onboard fluid systems, with exact working medium and installation area to be confirmed by passport or technical specification.

4055A as aviation technical equipment

The 4055A belongs to the category of aviation technical equipment that normally requires strict identification and documentation. Items of this class are usually supplied from specialized aviation stocks, storage warehouses, overhaul facilities or technical inventory holders. For aircraft use, the condition of the unit must be supported by a passport, label, form sheet, acceptance record or repair documentation. This is important because external appearance alone does not confirm serviceability, remaining life, storage status, compatibility or permission for installation on a specific aircraft.

Working media and operating environment of 4055A

Pumps of this class may work with aviation fuel, hydraulic fluid, oil or other approved non-aggressive working media, depending on the system where the exact 4055A version is installed. The operating environment is typically aviation-grade: vibration, temperature changes, pressure variation, fluid cleanliness requirements and long storage periods are all relevant. Before installation or sale, the ports and internal passages should be checked for cleanliness and preservation condition. Contamination inside a fuel, oil or hydraulic pump can create problems in the connected system even if the unit appears serviceable from the outside.

4055A and related aircraft pump families

In aviation stock lists and procurement requests, the 4055A may appear near other aircraft pump assemblies such as 888, 889, 4020, 465MTV, 623K or NP-series hydraulic units. This does not mean the units are interchangeable. It only shows that they belong to the wider group of aircraft pump and fluid-control equipment. Each item has its own purpose, pressure range, drive type, working medium, mounting interface and documentation. For this reason, the 4055A must be ordered by its exact designation, not by general pump category or visual similarity.

Identification of 4055A for aircraft use

For correct identification, the product passport is the main reference. It may contain the exact designation, serial number, manufacturer data, acceptance stamp, storage records, repair status and sometimes the system or object index for which the item was produced. If the pump is required for a specific aircraft, engine or ground unit, this information should be checked before shipment. In many cases, repair plants and aviation technical bases verify such applicability through internal catalogs, technical conditions and aircraft-specific parts lists rather than through public sources.

Supply, inspection and documentation for 4055A

Before supplying or installing the 4055A, the unit should be inspected for housing condition, drive or motor section if applicable, inlet and outlet ports, sealing surfaces, traces of corrosion, preservation state and documentation. If the pump has been stored for a long time, additional checking may be needed before installation. For aviation procurement, the request should state the required condition: new from storage, serviceable, repaired, overhauled or for repair. If exact performance data is required, it should be taken from the passport, technical specification or bench-test report for the specific unit.

Product Type: pump
Designation: 4055A
Function: Pumping, circulation, pressure support, or feed of working medium depending on aircraft system configuration
Application / Where Used: Aircraft onboard hydraulic, fuel, oil, or special service systems according to applicable documentation
System / Installation Area: System-specific installation point; to be confirmed by aircraft parts catalog or product passport
Equipment Category: Aviation technical item / aircraft spare part
Possible Working Media: Aviation fuel, hydraulic fluid, oil, or approved non-aggressive service liquid depending on system application
Possible Drive Type: To be confirmed by passport and system documentation
Power Supply / Drive Data: To be confirmed by product passport
Pressure and Flow Data: To be confirmed by product passport or technical conditions
Associated / Similar Supply Group Items: 888, 4020, 465MTV, 623K and other aviation pump units may appear in supplier listings, but this does not confirm interchangeability
Typical Supply Condition: New old stock, storage item, repaired or serviceable unit depending on availability
Required Checks: Passport, nameplate, preservation status, port condition, mounting condition, storage history, and bench-test data where available
Technical Documentation: Product passport, form, acceptance records, technical conditions, aircraft system documentation where 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.