011389-502 — Ground Cooling Fan Repair & Overhaul

Component Overview

The ground cooling fan provides forced cooling airflow to heat exchangers and equipment when the aircraft is stationary and ram air from forward motion is unavailable. Driven by an electric motor or air motor, the fan and its impeller draw or push air through pack heat exchanger faces and avionics or equipment compartments, maintaining temperature limits during taxi, ground operation, and low-speed flight. It is sized to overcome ducting and core pressure losses while running quietly. Typical degradation includes motor bearing wear, brush or winding deterioration, impeller imbalance from erosion or contamination, blade cracking, and reduced airflow from fouling or worn seals. Vibration, current draw, and airflow checks guide bearing replacement, rebalancing, and overhaul.

Aircraft Application

Part number 011389-502 (Ground Cooling Fan) is installed on the Dornier 328. QTC supports operators and MROs servicing this platform with certified repair and overhaul.

Our Repair Capability

QTC repairs and overhauls 011389-502 to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our team — including former OEM air cycle 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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Frequently Asked Questions