The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-059-5150, 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 Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-059-5150 |
| Primary Part Number | 2-54522-503 |
| Item Name | Duct Assembly,air Conditioning-H |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company |
| 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 |
|---|---|
| 2-54522-503 | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company (USA) |
| 2-54522-503 | Kent Associates, Inc (USA) |
| Reference | Meaning |
|---|---|
| 2-54522-503 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 2-54522-503 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
NSN 1660-01-059-5150 is a Duct Assembly,air Conditioning-H, manufactured by Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-059-5150 has 2 manufacturer part numbers on file: 2-54522-503 (Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company), 2-54522-503 (Kent Associates, Inc).
Key specifications for 2-54522-503: Special Features: CONSISTS OF P/N 2-54517-501 BRACKET,P/N 2-54522-7 DUCT,P/N 2-54522-9 DISK,P/N 2-54517-503 BRACKET,P/N 8-00508-1021 MARKING; End Item Identification: ACFT MODEL NO. F-JF. 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 1660-01-059-5150 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.