The Noise Suppressor System,aircraft, cataloged under National Stock Number 4920-01-127-4640, 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 Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4920-01-127-4640 |
| Primary Part Number | 8045581 |
| Item Name | Noise Suppressor System,aircraft |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics |
| Status | ACTIVE |
| General Characteristics Item Description | AN ARCHED, STEEL ROOF STRUCTURE, WITH ACOUSTICAL PANELS |
| Reference Data and Literature | TECH ORDER=ENCLOSED NOISE SUPPRESSOR SYSTEM, AIRCRAFT/ENGINE(HUSH HOUSE), 60HZ AND 50HZ, TYPES A/F 37T-10 AND -11; 33D4-6-645-4 |
| Functional Description | USED TO PERFORM NOISE SUPPRESSED ENGINE POWER RUNS/CHECKS ON VARIOUS TACTICAL FIGHTER AIRCRAFT, WITH THE ENGINES INSTALLED, OR MOUNTED ON A TEST STAND |
| Type/model Designation | A/F 37T-10 |
| 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 |
|---|---|
| 8045581 | Vital Link, Inc. Dba Vital Link Inc (USA) |
| 8045581 PRIMARY | Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics (USA) |
| Reference | Meaning |
|---|---|
| A/F 37T-10 | D/9 Drawing number reference only U.S. Government activity |
| A/F 37T-10 | 5/9 Secondary reference Vital Link, Inc. Dba Vital Link Inc |
| 8045581 | D/9 Drawing number reference only U.S. Government activity |
| A/F 37T-10 | 5/1 Secondary reference U.S. Government activity |
| 8045581 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4920-01-127-4640 is a Noise Suppressor System,aircraft, manufactured by Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-127-4640 has 2 manufacturer part numbers on file: 8045581 (Vital Link, Inc. Dba Vital Link Inc), 8045581 (Industrial Acoustics Company, Inc. Dba I a C Div Iac Acoustics).
Key specifications for 8045581: General Characteristics Item Description: AN ARCHED, STEEL ROOF STRUCTURE, WITH ACOUSTICAL PANELS; Reference Data and Literature: TECH ORDER=ENCLOSED NOISE SUPPRESSOR SYSTEM, AIRCRAFT/ENGINE(HUSH HOUSE), 60HZ AND 50HZ, TYPES A/F 37T-10 AND -11; 33D4-6-645-4; Special Features: EIGHTY-TWO FEET LONG, 65 FEET WIDE, 32 FEET HIGH, AND HAS 5,318 SQUARE FEET OF FLOOR SPACE; CAN COMPLETELY ENCLOSE THE F-22 AIRCRAFT, ALONG WITH ASSOCIATED EQUIPMENT AND PERSONNEL FT; Functional Description: USED TO PERFORM NOISE SUPPRESSED ENGINE POWER RUNS/CHECKS ON VARIOUS TACTICAL FIGHTER AIRCRAFT, WITH THE ENGINES INSTALLED, OR MOUNTED ON A TEST STAND. 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 4920-01-127-4640 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.