Primary/Secondary Air/Air Heat Exchanger Repair & Overhaul
FAA & EASA certified primary/secondary air/air heat exchanger repair and overhaul.
About the Primary/Secondary Air/Air Heat Exchanger
A primary/secondary air-to-air heat exchanger is a staged cooling unit within the air cycle pack that progressively removes heat from compressed bleed air using ram or fan air as the cooling medium. The primary stage cools incoming bleed air ahead of the air cycle machine compressor, while the secondary stage cools the recompressed air before turbine expansion, together maximizing the system's cooling capacity. Typically a brazed plate-fin aluminum core, it handles high differential temperatures and pressures. Overhaul is driven by core fouling, fin corrosion and erosion, thermal-fatigue and vibration cracking, braze-joint separation, header distortion, and internal leakage between hot and cold passages, all of which reduce heat-transfer effectiveness and can degrade overall pack performance and downstream temperature control.
Our Primary/Secondary Air/Air Heat Exchanger Repair Capability
QTC repairs and overhauls primary/secondary air/air heat exchanger components to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our engineers — including former OEM heat transfer 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 Primary/Secondary Air/Air Heat Exchanger Parts We Service
Click a part number for repair details and to request a quote.
Frequently Asked Questions
Does QTC repair primary/secondary air/air heat exchanger components?
Yes. QTC repairs and overhauls primary/secondary air/air heat exchanger components under our FAA & EASA Part 145 approvals. Our catalog lists 4 primary/secondary air/air heat exchanger part numbers. Request a quote to confirm capability and turnaround.
What aircraft use the primary/secondary air/air heat exchanger?
In our catalog, primary/secondary air/air heat exchanger part numbers appear on Bombardier. See the full parts list below.
What is involved in primary/secondary air/air heat exchanger 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 Primary/Secondary Air/Air Heat Exchanger Repair
Send us your part numbers and condition. Our engineers respond with repair scope, turnaround, and pricing.