The CFM56-5 was the Airbus-specific branch of the CFM56 family, tailored to the A320’s requirements when the aircraft launched in the late 1980s. Where the CFM56-3 powered the Boeing 737 Classic, the -5 variant introduced improvements in efficiency and emissions that matched the A320’s more modern systems architecture.
CFM56-5 Variant Overview
The primary subject of this technical guide focuses on the CFM56-5 engine, engineered specifically for High-Bypass Turbofan applications. Below is an essential digest of this powertrain configuration.
• Airbus-specific CFM56 variant
• 22,000–26,500 lbf thrust
• Powered A320 family launch
• High-bypass architecture
CFM56-5A Technical Data
Takeoff thrust of 22,000–26,500 lbf across variants; dry weight approximately 5,139 lb; high-bypass turbofan configuration.
The CFM56-5 family spans several dash numbers: the -5A1, -5A3, -5A4, and -5A5, each tuned for specific A320 weight and performance requirements. The engine’s high-bypass architecture—with a large fan moving substantial air around the core—delivered the fuel efficiency airlines needed for short- to medium-haul routes. Its success on the A320 helped cement CFM International’s position as the dominant narrowbody engine supplier.
| Type | High-bypass turbofan |
|---|---|
| Takeoff Thrust (5A3) | 26,500 lbf |
| Takeoff Thrust (5A4) | 22,000 lbf |
| Max Continuous (5A4) | 20,670 lbf |
| Dry Weight | 2,331 kg (5,139 lb) |
| Length | 2,422 mm (95.3 in) |
| Fuel | Jet A / Jet A-1 |
Aircraft Powered by the CFM56-5
This engine model is deployed across various operational frameworks. Here is a breakdown of the typical machine or vehicle applications using this unit:
Airbus A320-200, Airbus A321-100, Airbus A319
Pros & Advantages
Optimized for A320 family requirements; strong fuel efficiency for its generation; proven CFM56 reliability.
Cons & Disadvantages
Older variants less efficient than LEAP-1A successors; some models have higher emissions than current standards.
Frequently Asked Questions (FAQs)
Q1: What is the difference between CFM56-5 and CFM56-5B?
A1: The CFM56-5 was the original A320 engine variant. The -5B is a later, improved derivative with higher thrust ratings and better efficiency, used on later A320 family models.
Q2: Which A320 variant used the CFM56-5A3?
A2: The CFM56-5A3, rated at 26,500 lbf takeoff thrust, powered higher-weight A320-200 models.
Q3: Who manufactures the CFM56-5?
A3: CFM International, the 50/50 joint venture between GE Aerospace and Safran Aircraft Engines.
The CFM56-5 entered service with the Airbus A320 in 1988, launching CFM’s dominance in the narrowbody market.