Cold Air Unit Repair & Overhaul
FAA & EASA certified cold air unit repair and overhaul.
About the Cold Air Unit
A cold air unit is the air cycle machine at the heart of an air conditioning pack, expanding pressurized engine bleed air across a turbine to extract energy and produce refrigerated air for cabin and avionics cooling. Mounted on a common shaft, the turbine and an associated compressor or fan rotate at high speed on bearings, with the turbine's work extraction dropping air temperature substantially. It is central to the Air Cycle system's cooling capability. Typical wear modes include bearing fatigue and spalling, shaft imbalance, blade erosion and tip-rub, seal leakage, and thermal distortion of the housing. Excessive vibration, axial play, contamination from upstream debris, and lubrication breakdown commonly drive overhaul, restoring rotor balance and rated cooling performance.
Our Cold Air Unit Repair Capability
QTC repairs and overhauls cold air unit components to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our engineers — including former OEM air cycle specialists — perform teardown, inspection, cleaning, component replacement, functional and leak testing, and certification, and develop repairs for rejected and beyond-economic-repair (BER) hardware.
All Cold Air Unit Parts We Service
Click a part number for repair details and to request a quote.
| Part number | Make | Model |
|---|---|---|
| 1716D000-001 | Dornier | 328 |
| 1716D000-002 | Dornier | 328 |
| 1762D000-001 | Dornier | 328 |
Frequently Asked Questions
Does QTC repair cold air unit components?
Yes. QTC repairs and overhauls cold air unit components under our FAA & EASA Part 145 approvals. Our catalog lists 3 cold air unit part numbers. Request a quote to confirm capability and turnaround.
What aircraft use the cold air unit?
In our catalog, cold air unit part numbers appear on Dornier. See the full parts list below.
What is involved in cold air unit repair and overhaul?
Our process typically includes incoming inspection, disassembly, cleaning, non-destructive evaluation, repair or replacement of worn elements, functional/leak testing, and certification with the appropriate airworthiness release.
Request a Quote for Cold Air Unit Repair
Send us your part numbers and condition. Our engineers respond with repair scope, turnaround, and pricing.