The Noise Suppressor System,aircraft, cataloged under National Stock Number 4920-01-286-8681, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-286-8681 |
| Item Name | Noise Suppressor System,aircraft |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | ENCLOSED SYSTEM FOR SMALL AIRCRAFT TEST CELL |
| Reference Data and Literature | TECH ORDER=33D4-6-747-4; IPB--ENCLOSED NOISE SUPPESSOR MODEL PD-MM-585; T38 |
| Functional Classification | HH-7.1 |
| Entry Date | 89-11-01 |
| Functional Description | USED TO REDUCE NOISE LEVELS DURING AIRCRAFT TRIM/POWER CHECKS |
| Type/model Designation | A/F 37T-12 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL C — Remove/Demil Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| PD-MME-585 | D/9 Drawing number reference only U.S. Government activity |
| PD-MME-585 | 5/9 Secondary reference U.S. Government activity |
| A/F 37T-12 | 5/1 Secondary reference U.S. Government activity |
| 8955755 | 5/9 Secondary reference Environmental Elements Corp |
| 8955755 | D/9 Drawing number reference only U.S. Government activity |
| 8955755 | 3/2 Design control — primary reference U.S. Government activity |
| A/F 37T-12 | D/9 Drawing number reference only U.S. Government activity |
NSN 4920-01-286-8681 is a Noise Suppressor System,aircraft, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
Key specifications for 4920-01-286-8681: General Characteristics Item Description: ENCLOSED SYSTEM FOR SMALL AIRCRAFT TEST CELL; Reference Data and Literature: TECH ORDER=33D4-6-747-4; IPB--ENCLOSED NOISE SUPPESSOR MODEL PD-MM-585; T38; Functional Classification: HH-7.1; Entry Date: 89-11-01. 6 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 4920-01-286-8681 has DEMIL Code C. 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.