The Leak Test Fixture,maintenance Ki, cataloged under National Stock Number 4920-01-221-0056, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is General Electric Company. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4920-01-221-0056 |
| Primary Part Number | 3C3291P03 |
| Item Name | Leak Test Fixture,maintenance Ki |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| FSC Application Data | MAINTENANCE KIT,OVERHAUL-A/C GENERATOR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3C3291P03 07482 | General Electric Company (USA) |
| 3C3291P03 PRIMARY | General Electric Company (USA) |
| 3C3291P03 | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 137157 | 5/1 Secondary reference U.S. Government activity |
| 3C3291 | D/9 Drawing number reference only General Electric Company |
| 3C3291P03 | 3/2 Design control — primary reference U.S. Government activity |
| 137157 | 5/1 Secondary reference Unison Industries Llc |
NSN 4920-01-221-0056 is a Leak Test Fixture,maintenance Ki, manufactured by General Electric Company, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-221-0056 has 3 manufacturer part numbers on file: 3C3291P03 07482 (General Electric Company), 3C3291P03 (General Electric Company), 3C3291P03 (Unison Industries Llc).
Key specifications for 3C3291P03: FSC Application Data: MAINTENANCE KIT,OVERHAUL-A/C GENERATOR; End Item Identification: B-1B ACFT AGE.. 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 4920-01-221-0056 has DEMIL Code Q. 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.