The Servomechanism,hydraulic-Pneumat, cataloged under National Stock Number 1650-01-381-3209, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-381-3209 |
| Item Name | Servomechanism,hydraulic-Pneumat |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| General Characteristics Item Description | T.O.9H2-4-285-4, MODEL ATU-126/A,PISTON TRAVEL EXTEND 3.164, RETRACT 3.057 INCHES, SIZE 21.400 WIDE, 8.620 HIGH, 30.948 LONG, WEIGHT 76.8 LBS LBS |
| Nuclear Hardness Critical Feature | HARDENED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | E |
| Reference | Meaning |
|---|---|
| B43872-1 | 3/2 Design control — primary reference U.S. Government activity |
| DAA3260P002-405 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
NSN 1650-01-381-3209 is a Servomechanism,hydraulic-Pneumat, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
Key specifications for 1650-01-381-3209: General Characteristics Item Description: T.O.9H2-4-285-4, MODEL ATU-126/A,PISTON TRAVEL EXTEND 3.164, RETRACT 3.057 INCHES, SIZE 21.400 WIDE, 8.620 HIGH, 30.948 LONG, WEIGHT 76.8 LBS LBS; Special Features: SERVOACTUATOR ASSEMBLY NO. 2, MODEL 17-391; End Item Identification: B-2A AIRCRAFT A; Nuclear Hardness Critical Feature: HARDENED. 2 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 1650-01-381-3209 has DEMIL Code D. 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.