GG670-95048-4 — Precooler (RH) Repair & Overhaul

Component Overview

A right-hand precooler is an air-to-air heat exchanger installed in the engine bleed-air system, using fan-discharge cooling air to lower high-pressure bleed temperature before it enters downstream pneumatic, anti-ice, and air-conditioning systems. As a heat-transfer pre-cooler, it employs a brazed plate-fin or tube-and-shell matrix in which hot bleed passes one side and cool fan air the other, with a fan-air modulating valve regulating outlet temperature. Operating under thermal cycling, vibration, and contamination, precoolers degrade through fin and braze-joint cracking, internal and external leakage, core fouling and corrosion that reduce effectiveness, and clogging that raises bleed temperatures. Repair centers on leak detection, core cleaning, braze and fin restoration, and pressure and thermal-performance testing to restore rated cooling.

Aircraft Application

Part number GG670-95048-4 (Precooler (RH)) is installed on the Bombardier CRJ700. QTC supports operators and MROs servicing this platform with certified repair and overhaul.

Our Repair Capability

QTC repairs and overhauls GG670-95048-4 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.

View Pre-Coolers capability →

Related Parts

Other precooler (rh) part numbers we repair — view all Precooler (RH) parts →

Frequently Asked Questions