Engines · turbofan · data as of October 5, 2026

CFM International CFM56 series

709 aircraft on the U.S. register carry a CFM International CFM56 series engine, rated at about 2200 horsepower. The Boeing 737 is the model most often fitted with it (488 aircraft). The aircraft carrying it were built between 1988 and 2018.

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 series. FAA spelling: CFM56 SERIES.

Fitted to model families

Boeing 737488Airbus A319113Airbus A32068Airbus A32134Douglas DC-84Boeing 7571Dassault FALCON 20001

Boeing 737 · Airbus A319 · Airbus A320 · Airbus A321 · Douglas DC-8 · Boeing 757 · Dassault FALCON 2000

Where they are owner's state

Texas207Georgia185Illinois131Utah102Washington19Delaware18Missouri9Arizona6Minnesota4Florida4

Kind of aircraft

Airliners and large jets708 (100%)Business jets1 (0.1%)

When the aircraft were built by decade

What the FAA has certified, ordered and been told about the CFM International CFM56 series the component layer

No FAA order in the current files names this engine series. Operators and repair shops have filed 2,440 failure reports with the FAA since 1995, 738 of them in the last ten years.

Failure reports 2,440 since · what operators and shops told the FAA

Parts most often reported as the reports name them

Engine359Pump62Hmu49Floor Support46Actuator44Frame44Floor Panel40Sensor40Skin39Connector35

Latest reports

2026-09-27Engine: smoke

2026-09-24Engine: fire

2026-09-23Warning Light: false activation

2026-09-22Engine: power loss

2026-09-21Blades: dented

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

Boeing 737 488 with this engine series
Airbus A319 113 with this engine series
Airbus A320 68 with this engine series
Airbus A321 34 with this engine series
Douglas DC-8 4 with this engine series
Boeing 757 1 with this engine series
Dassault FALCON 2000 1 with this engine series

Where they are

Texas 207 of these aircraft
Georgia 185 of these aircraft
Illinois 131 of these aircraft
Utah 102 of these aircraft
Washington 19 of these aircraft

Biggest operators

Delta Air Lines INC 185 of these aircraft
United Airlines INC 131 of these aircraft
Southwest Airlines CO 111 of these aircraft
American Airlines INC 93 of these aircraft
Bank Of Utah Trustee 52 of these aircraft

Airworthiness

Failure reports on the CFM International CFM56 series 2,440 reports since 1995

Analytics

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

Aircraft newest certificates first · 709

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N321US	Airbus Industrie A320-211	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2015-06-30	Valid
N325US	Airbus Industrie A320-211	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2015-06-10	Valid
N338NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2014-12-08	Valid
N7721E	Boeing 737-7BD	Fixed-wing, multi-engine	Southwest Airlines CO Dallas, Texas	Standard	2014-02-24	Valid
N7713A	Boeing 737-7BD	Fixed-wing, multi-engine	Southwest Airlines CO Dallas, Texas	Standard	2013-12-11	Valid
N7715E	Boeing 737-7BD	Fixed-wing, multi-engine	Southwest Airlines CO Dallas, Texas	Standard	2013-12-02	Valid
N319US	Airbus Industrie A320-211	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2013-02-01	Valid
N300SW	Boeing 737-3H4	Fixed-wing, multi-engine	Frontiers of Flight Museum INC Dallas, Texas	Standard	2011-07-13	Valid
N836BA	Boeing 737-7BC	Fixed-wing, multi-engine	Boeing CO Gary, Indiana	Standard	2010-12-16	Valid
N314NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N315NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N316NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N317NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N318NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N319NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N320NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N321NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N322NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N323NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N324NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N325NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N326NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N327NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N328NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N329NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N330NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N332NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N333NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N333NW	Airbus Industrie A320-211	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N334NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N334NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N335NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N335NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N336NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N336NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N337NB	Airbus Industrie A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N338NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N339NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N339NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N340NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N340NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N341NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N341NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N342NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N343NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N343NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N344NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N344NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N346NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N347NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N347NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N348NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N348NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N349NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N350NA	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N351NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N351NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N352NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N352NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N353NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N353NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N354NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N354NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N355NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N355NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N356NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N357NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N357NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N358NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N358NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N359NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N359NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N360NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N360NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N361NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N361NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N362NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N362NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N363NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N363NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N364NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N365NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N366NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N368NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N369NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N370NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N371NB	Airbus A319-114	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N371NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N372NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N373NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N374NW	Airbus Industrie A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N375NC	Airbus A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N376NW	Airbus A320-212	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N377NW	Airbus A320-211	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N378NW	Airbus A320-211	Fixed-wing, multi-engine	Delta Air Lines INC Atlanta, Georgia	Standard	2009-12-31	Valid
N978AN	Boeing 737-823	Fixed-wing, multi-engine	Msn 30100 Trust Wilmington, Delaware	Standard	2009-11-23	Valid
N938AN	Boeing 737-823	Fixed-wing, multi-engine	Wilmington Trust CO Trustee Wilmington, Delaware	Standard	2008-05-15	Valid
N925AN	Boeing 737-823	Fixed-wing, multi-engine	Wilmington Trust CO Trustee Wilmington, Delaware	Standard	2008-05-14	Valid
N939AN	Boeing 737-823	Fixed-wing, multi-engine	Wilmington Trust CO Trustee Wilmington, Delaware	Standard	2008-05-14	Valid
N924AN	Boeing 737-823	Fixed-wing, multi-engine	Wilmington Trust CO Trustee Wilmington, Delaware	Standard	2008-05-13	Valid

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.