The Heater,aircraft, cataloged under National Stock Number 1660-00-689-6853, 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 Grimes Aerospace Company. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1660-00-689-6853 |
| Primary Part Number | A52C90 |
| Item Name | Heater,aircraft |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Heat Delivery Rate | 100000.0 BRITISH THERMAL UNIT |
| Inclosure Material | STEEL |
| Criticality Code Justification | AGAV |
| Diameter | 9.500 INCHES NOMINAL IN |
| Fuel Type | JP-5 JET FUEL |
| Heat Outlet Quantity | 1 |
| Heat Discharge Outlet Type | STATIONARY |
| Heat Delivery Direction | HORIZONTAL |
| Height | 27.300 INCHES NOMINAL IN |
| Heat Directing Device | FIXED LOUVER |
| Ignition Method | ELECTRODE |
| Mounting Type | VENTILATION DUCT |
| Fuel Feed Method | EXTERNAL PUMP |
| Heating Element Type | COMBUSTION CHAMBER |
| Operating Control Type | THERMOSTATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| A52C90 PRIMARY | Grimes Aerospace Company (USA) |
| Reference | Meaning |
|---|---|
| A52C90 | 5/9 Secondary reference Kelly Aerospace Power Systems, Inc. Dba Consolidated Fuel Systems |
| A52C90 | C/1 Advisory reference — outside the item-of-supply concept Hartzell Engine Technologies Llc |
NSN 1660-00-689-6853 is a Heater,aircraft, manufactured by Grimes Aerospace Company, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-689-6853 has 1 manufacturer part number on file: A52C90 (Grimes Aerospace Company).
Key specifications for A52C90: Heat Delivery Rate: 100000.0 BRITISH THERMAL UNIT; Inclosure Material: STEEL; Criticality Code Justification: AGAV; Diameter: 9.500 INCHES NOMINAL IN. 15 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 1660-00-689-6853 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.