627962-2 — Duct Temperature Sensor Repair & Overhaul

Component Overview

A duct temperature sensor measures air temperature within the conditioned-air distribution ducting, supplying the temperature signal that environmental control logic uses to modulate mixing and pack outputs and to maintain selected cabin or zone temperatures. It is generally a resistance-based probe such as an RTD or thermistor mounted in the duct wall, with the sensing element exposed to airflow and wired through sealed terminals. Because it operates under continual airflow, vibration, and thermal cycling, its principal degradation modes are calibration drift and resistance error, open or short circuits in the element, insulation deterioration, connector corrosion, and physical probe damage. Inspection commonly reveals out-of-tolerance resistance, intermittent or erratic output, and damaged leads or housings. Repair and overhaul restore element accuracy, electrical integrity, and sealing to ensure dependable temperature sensing.

Aircraft Application

627962-2 is used across multiple aircraft platforms. Contact QTC with your aircraft type and we'll confirm applicability and repair scope.

Our Repair Capability

QTC repairs and overhauls 627962-2 to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our team — including former OEM sensors & switches 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