The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-00-342-1297, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Raytheon Company. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-342-1297 |
| Primary Part Number | 240-3398552 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Aircraft Mission Design Series | C-131 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 240-3398552 | Raytheon Company (USA) |
| Reference | Meaning |
|---|---|
| 240-3398552 | 3/9 Design control — primary reference Bae Systems Technology Solutions & Services Inc. |
| 240-3398552 | 5/9 Secondary reference Tracor Flight Systems Inc Sub of Tracor Inc |
| 240-3398552 | 5/9 Secondary reference General Dynamics Corp Convair Div Lindbergh Field Facility |
| 240-3398552 | 5/9 Secondary reference Hughes Missile Systems Co San Diego |
NSN 1660-00-342-1297 is a Duct Assembly,air Conditioning-H, manufactured by Raytheon Company, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-342-1297 has 1 manufacturer part number on file: 240-3398552 (Raytheon Company).
Key specifications for 240-3398552: End Item Identification: C-131 AIRCRAFT; Aircraft Mission Design Series: C-131. 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 1660-00-342-1297 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.