Engine Overview
The CFM56-5B is a high-bypass turbofan developed by CFM International for the Airbus A320ceo family.
| Engine Family | CFM56-5B |
|---|---|
| Type | High-bypass turbofan |
| Thrust Range | Approx. 21,600–33,000 lbf |
| Fan Diameter | 68.3 in |
| Dry Weight | Approx. 5,250 lb / 2,380 kg |
| Applications | Airbus A318, A319, A320, A321 |
Variants & Aircraft Applications
Variant applications and thrust differ by aircraft configuration.
| Engine Variant | Primary Application |
|---|---|
| CFM56-5B1 / -5B2 / -5B3 | A321 |
| CFM56-5B4 | A320 |
| CFM56-5B5 / -5B6 / -5B7 | Primarily A319; some A320 configurations |
| CFM56-5B8 / -5B9 | A318 |
Final applicability must be verified against current approved aircraft and engine documentation.
Global Fleet Footprint
CFM56-5B demand remains broad across all major aviation regions, supporting an active global aftermarket for engines, LLPs, modules and material.
Operator/country lists change continuously; this page therefore uses a regional market view instead of a static complete operator list.
Representative CFM56-5B LLP P/Ns
| Module | P/N | Description |
|---|---|---|
| Fan/LPC | 338-001-504-0 | Stage 1 Fan Disk |
| Fan/LPC | 338-001-906-0 | Booster Spool |
| Fan/LPC | 338-010-601-0 | Fan Shaft Assembly |
| HPC | 1386M56P03 | HPC Front Shaft |
| HPC | 1558M31G07 | Stages 1–2 Spool |
| HPT | 1498M43P07 | HPT Rotor Disk |
| LPT | 336-001-804-0 | LPT Stage 1 Disk |
Reference only. LLP applicability and certified life are configuration/revision specific.
Maintenance & Shop-Visit Planning
| Performance | Track EGT margin, oil consumption, vibration and performance trend. |
|---|---|
| Inspections | Follow approved maintenance data, findings, AD/SB requirements and operating environment. |
| LLP planning | Remaining cycles can materially influence removal timing and workscope economics. |
| Workscope | May range from targeted quick-turn work to module repair and full performance restoration. |
There is no single universal “overhaul every X cycles” interval for all CFM56-5B engines.
Indicative Shop-Visit Cost Context
Public market references place a CFM56-5B performance-restoration event broadly in the ~USD 1.5M–4.0M range before major LLP replacement requirements. Actual quotations can be materially outside this range.
| Main drivers | Workscope, LLP status, HPT/LPT material, repairability, USM availability, labor and shop capacity. |
|---|---|
| LLP impact | A substantial LLP replacement package can add several million dollars. |
Budgetary context only; not a CFM Gate quotation.
Commonly Sourced CFM56-5B Material
CFM Gate's current RFQ/OFFER database is not yet classified reliably by engine family, so this page does not publish an artificial “top PN” ranking. Typical sourcing categories include fan and booster material, HPC/HPT/LPT rotating hardware, HPT nozzles and blades, bearings, fuel and oil-system accessories, valves, pumps, starters and other traceable rotables.
When engine-family tagging becomes available, this section can be upgraded to show genuine high-demand P/Ns and current RFQ/offer activity.
Need CFM56-5B Engines or Parts?
Send your requirement and our team will review current sourcing options.