The Heat Exchanger,air to Air,aircra, cataloged under National Stock Number 1660-01-524-5385, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-01-524-5385 |
| Primary Part Number | 194272-3 |
| Item Name | Heat Exchanger,air to Air,aircra |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 194272-3 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| HL20PB-18-33 | 5/2 Secondary reference U.S. Government activity |
NSN 1660-01-524-5385 is a Heat Exchanger,air to Air,aircra, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-524-5385 has 1 manufacturer part number on file: 194272-3 (Honeywell International Inc. Div Aerospace - Torrance).
1 possible match (shared part number, not a government interchangeability claim): 5320-01-542-5385. Verify interchangeability with system specifications before substitution.
Key specifications for 194272-3: Part Name Assigned by Controlling Agency: EXCHANGER ASSEMBLY, HEAT SECONDARY (SERIES 3); End Item Identification: AIRCRAFT, B757. 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.
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.