The U.S. aircraft register, updated daily
Engines · turbofan · data as of October 5, 2026

CFM International CFM56-5B3/3

104 aircraft on the U.S. register carry a CFM International CFM56-5B3/3 engine, rated at about 32,000 pounds of thrust. The Airbus A321 is the model most often fitted with it (104 aircraft). The aircraft carrying it were built between 2013 and 2021.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as CFM International CFM56-5B3/3. FAA spelling: CFM56-5B3/3.

Fitted to model families

Airbus A321104

Airbus A321

Where they are owner's state

Georgia49Utah44Delaware7Texas3Maryland1

Kind of aircraft

Airliners and large jets104 (100%)

When the aircraft were built by decade

018375674742010302020

What the FAA has certified, ordered and been told about the CFM International CFM56-5B3/3 the component layer

The design is held under 2 type certificates. The FAA has issued 12 airworthiness directives (orders that owners must comply with) that name this engine series. Operators and repair shops have filed 30 failure reports with the FAA since 1995, 28 of them in the last ten years.

FAA orders 12 airworthiness directives · newest first

2023-05-102023-05-05 · Turbine Engine Compressor Section · engine
2021-06-242021-10-09 · Turbine Engine Compressor Section · engine
2017-04-132017-05-09 · Accessory Gearboxes · engine
2016-03-012016-02-04 · Turbine rear frames (TRFs) · engine
2013-09-032013-14-06 · Hydro-mechanical unit (HMU) fuel control · engine
2012-03-152012-02-03 · Engine · engine

All orders naming the CFM International CFM56-5B3/3

Failure reports 30 since · what operators and shops told the FAA

024681618192022232425526

Parts most often reported as the reports name them

Engine6Hydraulic Line2Idg2Angle1B-Nut1Bleed Air Sys1Blocker Door1Compressor1Ecu1Eec1

Latest reports

2026-10-04Ecu: faulted
2026-05-07Pump: failed
2026-05-03Compressor: stalled
2026-05-02Generator: faulted
2026-02-11Eec: faulted

Certificates and bulletins

E37NEType certificate held by Cfm International S.A. · 52 models listed · revised January 15, 2026
E38NEType certificate held by Cfm International S.A. · 52 models listed · revised January 15, 2026

Safety bulletins 3 · advice, not orders

2014-05-28NE-08-17R3 · Turbine Section - Propulsion Technology LLC Unapproved Repair
2012-04-27NE-12-29 · Engine Fuel Distribution CFM56-5B LPTACC Fuel Manifold
2011-03-07NE-08-17R2 · Turbine Section - Propulsion Technology LLC Unapproved Repair

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Biggest operators

These connections as data: /graph/engine/cfm-international-cfm56-5b3-3.json · about the eFlight graph.

Aircraft newest certificates first · 104

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N306DN Airbus Sas
A321-213
Fixed-wing, multi-engine Delta Air Lines INC
Atlanta, Georgia
Standard 2016-07-14 ValidFAA registration status code V: Valid registration. All codes
N154UW Airbus
A321-211
Fixed-wing, multi-engine American Airlines INC
Fort Worth, Texas
Standard 2015-12-30 ValidFAA registration status code V: Valid registration. All codes
N156UW Airbus
A321-211
Fixed-wing, multi-engine American Airlines INC
Fort Worth, Texas
Standard 2015-12-30 ValidFAA registration status code V: Valid registration. All codes
N157UW Airbus
A321-211
Fixed-wing, multi-engine American Airlines INC
Fort Worth, Texas
Standard 2015-12-30 ValidFAA registration status code V: Valid registration. All codes
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Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.