The Test Set,electronic Systems, cataloged under National Stock Number 4920-01-355-4478, 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 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple. Government technical data includes 4 specifications, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Test Set,electronic Systems |
| FSC / FSG | 4920 — Aircraft Maintenance and Repair Shop Specialized Equipment (FSG 49) |
| Manufacturers | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (CAGE 26916) |
| Parameter | Value |
|---|---|
| NSN | 4920-01-355-4478 |
| Primary Part Number | A31U18240-2 |
| Item Name | Test Set,electronic Systems |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| Status | ACTIVE |
| Reference Data and Literature | T.O. 33D7-38-305-2/4 |
| Functional Description | USED TO TEST LRU'S AND SUPPORT EQUIPMENT |
| Enclosure Feature | MULTIPLE ITEM W/HOUSING |
| Test Type for Which Designed | LRU RELIABILITY |
| 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 |
|---|---|
| A31U18240-2 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA) |
| Reference | Meaning |
|---|---|
| 91 TIRM-14 | 5/9 Secondary reference U.S. Government activity |
| 91 TIRM-14 | D/9 Drawing number reference only U.S. Government activity |
| A31U18240-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A31U18240-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| AN/GSM-397 | 5/1 Secondary reference U.S. Government activity |
NSN 4920-01-355-4478 is a Test Set,electronic Systems, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-355-4478 has 1 manufacturer part number on file: A31U18240-2 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple).
Key specifications for A31U18240-2: Reference Data and Literature: T.O. 33D7-38-305-2/4; Functional Description: USED TO TEST LRU'S AND SUPPORT EQUIPMENT; Enclosure Feature: MULTIPLE ITEM W/HOUSING; End Item Identification: F-15 ACFT. 4 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 4920-01-355-4478 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.