5677C000-002 — Pneumatic Temperature Sensor Repair & Overhaul

Component Overview

A pneumatic temperature sensor measures the temperature of bleed air or conditioned air within ducting and supplies a signal to temperature-control and protection logic, operating within the sensors-and-switches domain as a temperature-sensing element. Typically a resistance-type element such as an RTD or thermistor housed in a probe with a duct-mounting boss, it provides a continuous, repeatable output proportional to air temperature for closed-loop regulation. In a hot, vibrating, high-cycle environment it is subject to element drift and calibration shift, open or short circuits from wire fatigue, insulation degradation, and connector corrosion. Probe-tip erosion, contamination, moisture ingress, and mounting-seal leakage are common failure modes that produce inaccurate or intermittent readings, driving element testing, resistance-versus-temperature verification, seal replacement, and recalibration.

Aircraft Application

Part number 5677C000-002 (Pneumatic Temperature Sensor) 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 5677C000-002 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