The Test Station,pneumatic System Co, cataloged under National Stock Number 4920-00-520-4642, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-00-520-4642 |
| Primary Part Number | 77674 |
| Item Name | Test Station,pneumatic System Co |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris |
| Status | ACTIVE |
| Reference Data and Literature | T.O. 33D2-12-10-4 |
| Functional Classification | AA-9.3 |
| Entry Date | 90-08-22 |
| Functional Description | USED FOR FUNCTIONAL TESTING OF ACFT PNEUMATIC AND ELECTRO-PNEUMATIC COMPONENTS UP TO 5000.0 PSI |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 77674 PRIMARY | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| Reference | Meaning |
|---|---|
| 77674 | 5/9 Secondary reference U.S. Government activity |
NSN 4920-00-520-4642 is a Test Station,pneumatic System Co, manufactured by Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-00-520-4642 has 1 manufacturer part number on file: 77674 (Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-536-0130, 5310-01-664-0981. Verify interchangeability with system specifications before substitution.
Key specifications for 77674: Reference Data and Literature: T.O. 33D2-12-10-4; Functional Classification: AA-9.3; Special Features: C/O SINGLE PRESSURIZED NITROGEN LINE THAT IS MAINTAINED AT 500 PSIG BY THE GAGED AIR DRIVEN,REGULATED BOOSTER PUMP; THE NITROGEN IS APPLIED TO 2 ACCUMULATOR TANKS; THE EJECTOR PUMP WHICH CREATES THE VACUUM SYSTEM,IS AIR DRIVEN BY CONTROLLED FLOW VALVES FILTERED FROM SHOP AIR; 220.0VAC,32.0-50.0HZ,SINGLE PHASE,0.0-32.0 VDC VDC; Entry Date: 90-08-22. 4 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4920-00-520-4642 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.