The Heat Exchanger,fuel,hydraulic Oi, cataloged under National Stock Number 1650-01-142-4292, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Triumph Thermal Systems, Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-142-4292 |
| Primary Part Number | UA539139-1 |
| Item Name | Heat Exchanger,fuel,hydraulic Oi |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Triumph Thermal Systems, Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| UA539139-1 PRIMARY | Triumph Thermal Systems, Llc (USA) |
| 74-540056-109 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10373314 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 1650-01-142-4292 is a Heat Exchanger,fuel,hydraulic Oi, manufactured by Triumph Thermal Systems, Llc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-142-4292 has 2 manufacturer part numbers on file: UA539139-1 (Triumph Thermal Systems, Llc), 74-540056-109 (The Boeing Company Div Defense).
Key specifications for UA539139-1: End Item Identification: AIRCRAFT MODEL F-18. 0 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 1650-01-142-4292 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.