The unit reduces the temperature of high-pressure engine bleed air before it enters downstream air-conditioning and pressurization components, helping maintain system efficiency, reliability, and component longevity. It is commonly identified as a Bleed Air Precooler Assembly and is used on certain CitationJet and Citation M2 aircraft applications.

Features
Original equipment manufacturer (OEM) precooler assembly.
Designed to cool engine bleed air prior to distribution within aircraft pneumatic systems.
Supports environmental control system (ECS) performance and cabin conditioning.
Nickel-alloy heat exchanger construction for durability in high-temperature environments.
Direct replacement component for approved aircraft installations. 

Benefits
Helps protect downstream pneumatic and air-conditioning components from excessive temperatures.
Contributes to efficient cabin pressurization and climate-control operation.
Engineered to meet OEM fit, form, and function requirements.
Supports continued airworthiness when installed in accordance with approved maintenance procedures. 

Technical Specifications
Part Number: 9914402-4
Description: Precooler Assembly / Bleed Air Precooler
Manufacturer: Cessna Aircraft (Textron Aviation)
Application: Aircraft pneumatic and environmental control systems
Weight: Approximately 5.98 lb (2.71 kg)
Dimensions: Approximately 17.45 × 6.45 × 6.80 in
Alternate Part Number: 8161-2
Aircraft Applications: Selected Cessna CitationJet and Citation M2 series aircraft (verify applicability through the applicable IPC and maintenance documentation). 

Typical Use
The 9914402-4 precooler functions as a heat exchanger that lowers bleed-air temperature before the air reaches air-conditioning, pressurization, and other pneumatic system components. This temperature reduction helps ensure safe and efficient operation of aircraft environmental control systems.