The Test Set,aircraft Engine, cataloged under National Stock Number 4920-01-197-5666, 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 Atec Inc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-197-5666 |
| Primary Part Number | AHT56038 |
| Item Name | Test Set,aircraft Engine |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Atec Inc |
| Status | ACTIVE |
| Reference Data and Literature | SERD NO. 5105 |
| Functional Description | USED TO MEASURE VARIOUS ENGINE OPERATING PRESSURES AS A SUPPLEMENT TO MAINTENANCE ANALYZER UNIT CAPABILITY AND TO COMPLETE ENGINE TROUBLESHOOTING ROUTINES TO IDENTIFY SPECIFIC MALFUNCTIONING COMPONENTS |
| Enclosure Feature | MULTIPLE ITEM W/CARRYING CASE |
| Test Type for Which Designed | F100-PW-220 ENGINE PRESSURE TESTS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL C — Remove/Demil Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AHT56038 PRIMARY | Atec Inc (USA) |
| PWA56038 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| H605 | 5/9 Secondary reference U.S. Government activity |
| TTU-471/E | 5/9 Secondary reference U.S. Government activity |
| 4920PL0874271 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4920PL1814939 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4920-01-197-5666 is a Test Set,aircraft Engine, manufactured by Atec Inc, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-197-5666 has 2 manufacturer part numbers on file: AHT56038 (Atec Inc), PWA56038 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-307-1981. Verify interchangeability with system specifications before substitution.
Key specifications for AHT56038: Reference Data and Literature: SERD NO. 5105; Special Features: REQUESTED NAME-TEST SET, PRESSURE;; ACTION ID 45534421; Functional Description: USED TO MEASURE VARIOUS ENGINE OPERATING PRESSURES AS A SUPPLEMENT TO MAINTENANCE ANALYZER UNIT CAPABILITY AND TO COMPLETE ENGINE TROUBLESHOOTING ROUTINES TO IDENTIFY SPECIFIC MALFUNCTIONING COMPONENTS; Enclosure Feature: MULTIPLE ITEM W/CARRYING CASE. 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 4920-01-197-5666 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.