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 |
|---|---|---|---|---|---|---|
| N940AN | Boeing 737-823 |
Fixed-wing, multi-engine | Wilmington Trust CO Trustee Wilmington, Delaware |
Standard | 2008-05-13 | ValidFAA registration status code V: Valid registration. All codes |
| N556AS | Boeing 737-890 |
Fixed-wing, multi-engine | Alaska Airlines INC Seattle, Washington |
Standard | 2006-06-29 | ValidFAA registration status code V: Valid registration. All codes |
| N236WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-05-31 | ValidFAA registration status code V: Valid registration. All codes |
| N800KS | Boeing 737-7BC |
Fixed-wing, multi-engine | Aej Services LLC Los Angeles, California |
Standard | 2006-05-10 | ValidFAA registration status code V: Valid registration. All codes |
| N234WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-05-01 | ValidFAA registration status code V: Valid registration. All codes |
| N232WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N553AS | Boeing 737-890 |
Fixed-wing, multi-engine | Alaska Airlines INC Seattle, Washington |
Standard | 2006-03-30 | ValidFAA registration status code V: Valid registration. All codes |
| N231WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-03-24 | ValidFAA registration status code V: Valid registration. All codes |
| N552AS | Boeing 737-890 |
Fixed-wing, multi-engine | Alaska Airlines INC Seattle, Washington |
Standard | 2006-03-01 | ValidFAA registration status code V: Valid registration. All codes |
| N229WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-02-17 | ValidFAA registration status code V: Valid registration. All codes |
| N551AS | Boeing 737-890 |
Fixed-wing, multi-engine | Alaska Airlines INC Seattle, Washington |
Standard | 2006-02-06 | ValidFAA registration status code V: Valid registration. All codes |
| N315TS | Boeing 737-7CU |
Fixed-wing, multi-engine | Tutor-Saliba CORP Sylmar, California |
Special flight permit | 2006-01-17 | ValidFAA registration status code V: Valid registration. All codes |
| N228WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-01-10 | ValidFAA registration status code V: Valid registration. All codes |
| N225WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-01-05 | ValidFAA registration status code V: Valid registration. All codes |
| N227WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2006-01-05 | ValidFAA registration status code V: Valid registration. All codes |
| N226WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-12-15 | ValidFAA registration status code V: Valid registration. All codes |
| N224WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-11-21 | ValidFAA registration status code V: Valid registration. All codes |
| N33294 | Boeing 737-824 |
Fixed-wing, multi-engine | Wells Fargo Trust CO Na Trustee Columbia, Maryland |
Standard | 2005-08-23 | ValidFAA registration status code V: Valid registration. All codes |
| N220WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-08-09 | ValidFAA registration status code V: Valid registration. All codes |
| N219WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-07-21 | ValidFAA registration status code V: Valid registration. All codes |
| N217JC | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-07-20 | ValidFAA registration status code V: Valid registration. All codes |
| N218WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-07-20 | ValidFAA registration status code V: Valid registration. All codes |
| N216WR | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-07-13 | ValidFAA registration status code V: Valid registration. All codes |
| N548AS | Boeing 737-890 |
Fixed-wing, multi-engine | Alaska Airlines INC Seattle, Washington |
Standard | 2005-07-01 | ValidFAA registration status code V: Valid registration. All codes |
| N214WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-06-22 | ValidFAA registration status code V: Valid registration. All codes |
| N215WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-06-20 | ValidFAA registration status code V: Valid registration. All codes |
| N213WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-06-13 | ValidFAA registration status code V: Valid registration. All codes |
| N212WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-05-27 | ValidFAA registration status code V: Valid registration. All codes |
| N211WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-05-10 | ValidFAA registration status code V: Valid registration. All codes |
| N209WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-05-05 | ValidFAA registration status code V: Valid registration. All codes |
| N210WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-04-27 | ValidFAA registration status code V: Valid registration. All codes |
| N207WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-04-13 | ValidFAA registration status code V: Valid registration. All codes |
| N208WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-04-13 | ValidFAA registration status code V: Valid registration. All codes |
| N206WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N205WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-03-23 | ValidFAA registration status code V: Valid registration. All codes |
| N204WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-03-18 | ValidFAA registration status code V: Valid registration. All codes |
| N203WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-03-10 | ValidFAA registration status code V: Valid registration. All codes |
| N201LV | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-03-03 | ValidFAA registration status code V: Valid registration. All codes |
| N200WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-02-17 | ValidFAA registration status code V: Valid registration. All codes |
| N499WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-02-15 | ValidFAA registration status code V: Valid registration. All codes |
| N498WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-02-11 | ValidFAA registration status code V: Valid registration. All codes |
| N497WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-02-04 | ValidFAA registration status code V: Valid registration. All codes |
| N546AS | Boeing 737-890 |
Fixed-wing, multi-engine | Alaska Airlines INC Seattle, Washington |
Standard | 2005-02-03 | ValidFAA registration status code V: Valid registration. All codes |
| N495WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-01-24 | ValidFAA registration status code V: Valid registration. All codes |
| N494WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2005-01-12 | ValidFAA registration status code V: Valid registration. All codes |
| N489WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-11-05 | ValidFAA registration status code V: Valid registration. All codes |
| N488WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-11-04 | ValidFAA registration status code V: Valid registration. All codes |
| N487WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-11-01 | ValidFAA registration status code V: Valid registration. All codes |
| N486WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-10-29 | ValidFAA registration status code V: Valid registration. All codes |
| N485WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-10-18 | ValidFAA registration status code V: Valid registration. All codes |
| N480WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-10-12 | ValidFAA registration status code V: Valid registration. All codes |
| N483WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-10-12 | ValidFAA registration status code V: Valid registration. All codes |
| N482WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-10-04 | ValidFAA registration status code V: Valid registration. All codes |
| N481WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N478WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-09-21 | ValidFAA registration status code V: Valid registration. All codes |
| N479WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-09-13 | ValidFAA registration status code V: Valid registration. All codes |
| N477WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-09-09 | ValidFAA registration status code V: Valid registration. All codes |
| N476WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-09-01 | ValidFAA registration status code V: Valid registration. All codes |
| N475WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-08-27 | ValidFAA registration status code V: Valid registration. All codes |
| N474WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-08-24 | ValidFAA registration status code V: Valid registration. All codes |
| N473WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-08-19 | ValidFAA registration status code V: Valid registration. All codes |
| N286WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-08-16 | ValidFAA registration status code V: Valid registration. All codes |
| N472WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-08-16 | ValidFAA registration status code V: Valid registration. All codes |
| N470WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-08-04 | ValidFAA registration status code V: Valid registration. All codes |
| N468WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-07-29 | ValidFAA registration status code V: Valid registration. All codes |
| N469WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-07-29 | ValidFAA registration status code V: Valid registration. All codes |
| N464WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-07-23 | ValidFAA registration status code V: Valid registration. All codes |
| N467WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-07-21 | ValidFAA registration status code V: Valid registration. All codes |
| N463WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-07-20 | ValidFAA registration status code V: Valid registration. All codes |
| N465WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-07-15 | ValidFAA registration status code V: Valid registration. All codes |
| N462WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-07-01 | ValidFAA registration status code V: Valid registration. All codes |
| N459WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-06-21 | ValidFAA registration status code V: Valid registration. All codes |
| N460WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-06-09 | ValidFAA registration status code V: Valid registration. All codes |
| N461WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-06-08 | ValidFAA registration status code V: Valid registration. All codes |
| N458WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-05-25 | ValidFAA registration status code V: Valid registration. All codes |
| N456WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-05-12 | ValidFAA registration status code V: Valid registration. All codes |
| N457WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-05-11 | ValidFAA registration status code V: Valid registration. All codes |
| N455WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-05-06 | ValidFAA registration status code V: Valid registration. All codes |
| N454WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-05-05 | ValidFAA registration status code V: Valid registration. All codes |
| N453WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-05-03 | ValidFAA registration status code V: Valid registration. All codes |
| N452WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-04-09 | ValidFAA registration status code V: Valid registration. All codes |
| N451WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-03-26 | ValidFAA registration status code V: Valid registration. All codes |
| N448WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-02-03 | ValidFAA registration status code V: Valid registration. All codes |
| N445WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-01-23 | ValidFAA registration status code V: Valid registration. All codes |
| N449WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-01-22 | ValidFAA registration status code V: Valid registration. All codes |
| N447WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2004-01-12 | ValidFAA registration status code V: Valid registration. All codes |
| N37281 | Boeing 737-824 |
Fixed-wing, multi-engine | United Airlines INC Chicago, Illinois |
Standard | 2003-12-22 | ValidFAA registration status code V: Valid registration. All codes |
| N36280 | Boeing 737-824 |
Fixed-wing, multi-engine | United Airlines INC Chicago, Illinois |
Standard | 2003-12-18 | ValidFAA registration status code V: Valid registration. All codes |
| N446WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-12-18 | ValidFAA registration status code V: Valid registration. All codes |
| N79279 | Boeing 737-824 |
Fixed-wing, multi-engine | United Airlines INC Chicago, Illinois |
Standard | 2003-11-26 | ValidFAA registration status code V: Valid registration. All codes |
| N444WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-11-04 | ValidFAA registration status code V: Valid registration. All codes |
| N443WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-11-03 | ValidFAA registration status code V: Valid registration. All codes |
| N442WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-10-28 | ValidFAA registration status code V: Valid registration. All codes |
| N441WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-09-26 | ValidFAA registration status code V: Valid registration. All codes |
| N440LV | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-09-24 | ValidFAA registration status code V: Valid registration. All codes |
| N436WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-09-22 | ValidFAA registration status code V: Valid registration. All codes |
| N439WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-09-15 | ValidFAA registration status code V: Valid registration. All codes |
| N438WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-09-03 | ValidFAA registration status code V: Valid registration. All codes |
| N437WN | Boeing 737-7H4 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-08-27 | ValidFAA registration status code V: Valid registration. All codes |
| N340LV | Boeing 737-3K2 |
Fixed-wing, multi-engine | Southwest Airlines CO Dallas, Texas |
Standard | 2003-08-07 | ValidFAA registration status code V: Valid registration. All codes |
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.