The Head Assembly,aircr, cataloged under National Stock Number 1650-01-478-9856, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Pall Aeropower Corporation. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-478-9856 |
| Primary Part Number | A290494 |
| Item Name | Head Assembly,aircr |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Pall Aeropower Corporation |
| Status | ACTIVE |
| Criticality Code Justification | AGAV |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 423DS020-2 | The Boeing Company (USA) |
| A290494 PRIMARY | Pall Aeropower Corporation (USA) |
NSN 1650-01-478-9856 is a Head Assembly,aircr, manufactured by Pall Aeropower Corporation, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-478-9856 has 2 manufacturer part numbers on file: 423DS020-2 (The Boeing Company), A290494 (Pall Aeropower Corporation).
Key specifications for A290494: Criticality Code Justification: AGAV; Part Name Assigned by Controlling Agency: HEAD ASSEMBLY; End Item Identification: H-46 HELICOPTER; PART OF BREATHER/DRYER FWD/AFT XMSN; NHA 423DS020-1. 1 specification is 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 1650-01-478-9856 has DEMIL Code B. 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.