28E99-7 — Oil Cooler Repair & Overhaul

Component Overview

An oil cooler is a heat-transfer component that removes heat from engine, generator, or gearbox lubricating oil by transferring it to a cooler medium, typically ram or fan air. Located in the heat-transfer system, it is usually a compact plate-fin or tube-and-fin core in which hot oil flows on one side and cooling air on the other, maintaining oil temperature within limits to preserve viscosity and lubricating film. Its primary function is to protect bearings and gears from thermal breakdown. Service-driven degradation includes air-side fin damage and external fouling, internal sludge or coking that restricts oil passages, corrosion, and crack or braze-joint failures that cause internal or external leakage. Repair and overhaul restore core integrity, clear blockages, and recover thermal effectiveness and leak-tightness.

Aircraft Application

Part number 28E99-7 (Oil Cooler) is installed on the Bombardier Dash 8. QTC supports operators and MROs servicing this platform with certified repair and overhaul.

Our Repair Capability

QTC repairs and overhauls 28E99-7 to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our team — including former OEM heat transfer engineers — performs teardown, inspection, cleaning, component replacement, functional testing, and certification, returning a serviceable unit with the appropriate airworthiness release. We also develop repairs for rejected and beyond-economic-repair (BER) hardware.

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Related Parts

Other oil cooler part numbers we repair — view all Oil Cooler parts →

Frequently Asked Questions