BSF-20PM-4

BSF-20PM-4 tracking-system unit

BSF-20PM-4 is an aircraft tracking-system block identified by drawing 6Zh3.031.013-04. It belongs to the 20PM electronic equipment group and is listed separately from BSF-20P and other BSF executions. The suffix PM-4 and the drawing ending -04 are therefore essential parts of the product identity.

Role in the 20PM equipment group

MiG-29 technical material places the BSF channel within the 20PM system alongside BUR-20PM and other control and indication channels. The available source confirms system membership and test interaction but does not publish a complete internal circuit or terminal table. The block should be described as a tracking-system unit rather than assigned invented voltage or performance values.

Documented MiG-29 context

Repair and inventory records connect BSF-20P-family equipment with the MiG-29. The reviewed system-check table explicitly names the 20PM BSF channel in the OEPnK-29 test sequence. This supports the aircraft and system context while the exact effectivity of the PM-4 execution must still be checked by drawing and aircraft records.

Identification and compatibility

BSF-20PM-4, BSF-20P and other BSF-20PM variants are related but not automatically interchangeable. Compare the full plate, 6Zh3.031.013-04 drawing, connectors, rack position and 20PM system execution. A shared housing or the abbreviation BSF is insufficient for substitution.

Inspection and ordering

Inspect the housing, mounting surfaces, connector contacts, seals and plate. Functional verification requires the correct 20PM / OEPnK-29 bench sequence and known interfaces. State the exact BSF-20PM-4 marking, aircraft and system, quantity, condition and document requirements in the enquiry. Related units are under Electronic Control Units.

Product Type: Aircraft tracking-system electronic unit
Primary Designation: BSF-20PM-4
Original Cyrillic Designation: БСФ-20ПМ-4
Drawing Designation: 6Zh3.031.013-04 / 6Ж3.031.013-04
Documented Equipment Group: 20PM
Documented Aircraft Context: MiG-29 equipment and OEPnK-29 check material
Associated Channel: 20PM BSF tracking-system channel
Associated Equipment: BUR-20PM and other 20PM control/indication channels in the documented check sequence
Related Executions: BSF-20P and other BSF-20PM variants; compatibility not assumed
Electrical Parameters: Must be confirmed from the PM-4 passport
Alternative Designations: BSF-20PM-4; BSF20PM4; БСФ-20ПМ-4; БСФ20ПМ4
Interchangeability: Only after matching the -04 drawing, connectors and system execution
Documentation: Product passport, drawing 6Ж3.031.013-04 and applicable 20PM system documents

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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.