The Exhaust Air Chamber Assy,right H, cataloged under National Stock Number 2990-01-078-9975, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-078-9975 |
| Item Name | Exhaust Air Chamber Assy,right H |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| FSC Application Data | MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT |
| General Characteristics Item Description | CONTAINS CLAMP 451L,COVER 88950,MUFFLER 89278,TUBE 89305-4,EXHAUST AIR CHAMBER 88953-1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 89309-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 2990-01-078-9975 is a Exhaust Air Chamber Assy,right H, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-01-078-9975: FSC Application Data: MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT; General Characteristics Item Description: CONTAINS CLAMP 451L,COVER 88950,MUFFLER 89278,TUBE 89305-4,EXHAUST AIR CHAMBER 88953-1; End Item Identification: PRESSURIZED CABIN TESTER,P/N 88998,4920-00-347-9455. 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.
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.