The Breather System, cataloged under National Stock Number 2990-01-617-9010, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Rolls-Royce Solutions America Inc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-617-9010 |
| Primary Part Number | DDE 23538886 |
| Item Name | Breather System |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Accessory Components and Quantity | HOSE-AIR FILTER TO S-TUBE (AIR SHUTDOWN) P/N 23538606 1; HOSE-AIR FILTER TO S-TUBE (NO AIR SHUTDOWN) P/N 23538607 1; ALFDEX BREATHER UNIT P/N 23538618 1; TUBE-ROCKER COVER TO BREATHER P/N 23538620 1; STUD BOLT P/N 23538621 1; BRACKET-ALFDEX MOUNTING P/N 23538622 1; BRACKET-OIL FILL TUBE P/N 23538624 1; DRAIN CASTING-TURBO AND ALFDEX P/N 23538842 1; HOSE-OIL COOLER TO ALFDEX HIGH PRESSURE INLET P/N 23538845 1; AIR FILTER P/N 23538846 1; FITTING-HIGH PRESSURE OIL INLET P/N 23538847 1; HOSE-TURBO OIL DRAIN P/N 23538848 1; CLAMP-AIR FILTER P/N 23538850 1; HOSE-ALFDEX TO AIR FILTER P/N 23538851 1; FITTING-TURBO OIL DRAIN HOSE P/N 5244760124 1; FITTING-OIL COOLER P/N 5319971672 1; FITTING-OLD STYLE OIL COOLER (INTO BLOCK) P/N 5361880166 1; INSTALLATION INSTRUCTIONS P/N 18SP668 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DDE 23538886 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
NSN 2990-01-617-9010 is a Breather System, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-617-9010 has 1 manufacturer part number on file: DDE 23538886 (Rolls-Royce Solutions America Inc).
Key specifications for DDE 23538886: Accessory Components and Quantity: HOSE-AIR FILTER TO S-TUBE (AIR SHUTDOWN) P/N 23538606 1; HOSE-AIR FILTER TO S-TUBE (NO AIR SHUTDOWN) P/N 23538607 1; ALFDEX BREATHER UNIT P/N 23538618 1; TUBE-ROCKER COVER TO BREATHER P/N 23538620 1; STUD BOLT P/N 23538621 1; BRACKET-ALFDEX MOUNTING P/N 23538622 1; BRACKET-OIL FILL TUBE P/N 23538624 1; DRAIN CASTING-TURBO AND ALFDEX P/N 23538842 1; HOSE-OIL COOLER TO ALFDEX HIGH PRESSURE INLET P/N 23538845 1; AIR FILTER P/N 23538846 1; FITTING-HIGH PRESSURE OIL INLET P/N 23538847 1; HOSE-TURBO OIL DRAIN P/N 23538848 1; CLAMP-AIR FILTER P/N 23538850 1; HOSE-ALFDEX TO AIR FILTER P/N 23538851 1; FITTING-TURBO OIL DRAIN HOSE P/N 5244760124 1; FITTING-OIL COOLER P/N 5319971672 1; FITTING-OLD STYLE OIL COOLER (INTO BLOCK) P/N 5361880166 1; INSTALLATION INSTRUCTIONS P/N 18SP668; Special Features: CLIP-DRIVE OIL LINE TO BLOCK P/N 02362448 1; CLAMP-HOSE, AIR AND OIL RETURN LINES P/N 05104958 4; CLAMP-HOSE,DRAIN LINE TO ALFDEX P/N 05186840 4; PLUG P/N 08925592 1; GASKET-DRAIN CASTING TO BLOCK P/N 08929302 1; 5306-01-186-5367 BOLT,MACHINE - OIL FILL TUBE BRACKET TO BLOCK 1; 5305-01-319-9881 SCREW,CAP,HEXAGON HEAD - ALFDEX TO MOUNTING BRACKET 3; BOLT-DRIVE OIL HOSE TO BLOCK P/N 11504986 1; NUT-DRAIN LINE CLIP TO STUD BOLT P/N 11506101 1; 5310-01-330-7592 NUT,PLAIN,EXTENDED WASHER,HEXAGON - ALFDEX TO MOUNTING BRACKET 3; BOLT-DRAIN CASTING TO BLOCK P/N 11509512 2; BOLT-DRAIN CASTING TO BLOCK P/N 11509514 2; HOSE-OIL DRAIN FROM AFLFDEX TO CASTING P/N 23502122 1; CLIP-DRAIN LINE TO STUD BOLT P/N 23506443 1; 4730-01-464-2348 PLUG,PIPE - TURBO OIL DRAIN PORT IN BLOCK 1; BOLT-MOUNTING BRACKET TO BLOCK P/N 23511786 3; HOSE-ROCKER COVER TO DRAIN LINE P/N 23518615 1; HOSE-DRAIN LINE TO ALFDEX P/N 23523931 1; BREATHER P/N 23530511 1; CLIP-DRIVE OIL LINE TO BLOCK P/N 23531026 1; End Item Identification: 2895-01-590-7317 ENGINE,RB-M PORT. 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.
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.