The Rear Fan Assy, cataloged under National Stock Number 4140-01-579-7183, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Manassas. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Rear Fan Assy |
| FSC / FSG | 4140 — Fans, Air Circulators, and Blower Equipment (FSG 41) |
| Manufacturers | Lockheed Martin Corporation Div Rms - Manassas (CAGE 52088) |
| Parameter | Value |
|---|---|
| NSN | 4140-01-579-7183 |
| Primary Part Number | B1378 |
| Item Name | Rear Fan Assy |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rms - Manassas |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| B1378 PRIMARY | Lockheed Martin Corporation Div Rms - Manassas (USA) |
| Reference | Meaning |
|---|---|
| B1378 | 3/2 Design control — primary reference U.S. Government activity |
| 8-10577-01 | 5/9 Secondary reference Drs C3 & Aviation Company Dba Fka Drs Electronic Systems |
NSN 4140-01-579-7183 is a Rear Fan Assy, manufactured by Lockheed Martin Corporation Div Rms - Manassas, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-579-7183 has 1 manufacturer part number on file: B1378 (Lockheed Martin Corporation Div Rms - Manassas).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.