Pratt & Whitney PW4056
25 aircraft on the U.S. register carry a Pratt & Whitney PW4056 engine, rated at about 56,750 pounds of thrust. The Boeing 747 is the model most often fitted with it (24 aircraft). The aircraft carrying it were built between 1990 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 Pratt & Whitney PW4056. FAA spelling: PW4056.
Fitted to model families
Boeing 74724Scaled Composites Llc 3511
Boeing 747 · Scaled Composites Llc 351
Where they are owner's state
Michigan15Washington3Florida3New York2Utah1Illinois1
Kind of aircraft
Airliners and large jets24 (96%)Business jets1 (4%)
When the aircraft were built by decade
What the FAA has certified, ordered and been told about the Pratt & Whitney PW4056 the component layer
No FAA order in the current files names this engine series. Operators and repair shops have filed 12,594 failure reports with the FAA since 1995, 52 of them in the last ten years.
Failure reports 12,594 since · what operators and shops told the FAA
Parts most often reported as the reports name them
Light3,159Lamp1,616Connector853Skin445Battery362Battery Pack310Wire292Feeder Cable269Power Supply161Frame155
Latest reports
2026-07-30Wire: detached
2026-07-12Pump: leaking
2026-06-17Oil System: low
2026-06-12Chip Detector: unsecure
2026-01-19Battery: inoperative
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 747 24 with this engine series
Where they are
- Michigan 15 of these aircraft
- Washington 3 of these aircraft
- Florida 3 of these aircraft
- New York 2 of these aircraft
- Utah 1 of these aircraft
Biggest operators
- Kalitta Air LLC 15 of these aircraft
- Boeing Aircraft Holding CO 3 of these aircraft
- Atlas Air INC 2 of these aircraft
- United Airlines INC 1 of these aircraft
- Bank Of Utah Trustee 1 of these aircraft
Airworthiness
- Failure reports on the Pratt & Whitney PW4056 12,594 reports since 1995
Analytics
These connections as data: /graph/engine/pratt-whitney-pw4056.json · about the eFlight graph.
Aircraft newest certificates first · 25
| Tail no. | Maker and model | Group | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|---|
| N706CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2026-03-02 | ValidFAA registration status code V: Valid registration. All codes |
| N471MC | Boeing 747-412 |
Fixed-wing, multi-engine | Atlas Air INC White Plains, New York |
Standard | 2024-04-11 | ValidFAA registration status code V: Valid registration. All codes |
| N489MC | Boeing 747-412F |
Fixed-wing, multi-engine | Atlas Air INC Purchase, New York |
Standard | 2023-03-21 | ValidFAA registration status code V: Valid registration. All codes |
| N702CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2022-08-18 | ValidFAA registration status code V: Valid registration. All codes |
| N701CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2022-08-17 | ValidFAA registration status code V: Valid registration. All codes |
| N702CA | Boeing 747-412 |
Fixed-wing, multi-engine | Ac Spe 5 LLC Orlando, Florida |
Standard | 2021-04-07 | ValidFAA registration status code V: Valid registration. All codes |
| N729CA | Boeing 747-412 |
Fixed-wing, multi-engine | Ac Spe 6 LLC Orlando, Florida |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N756CA | Boeing 747-412 |
Fixed-wing, multi-engine | Ac Spe 4 LLC Orlando, Florida |
Standard | 2021-03-16 | ValidFAA registration status code V: Valid registration. All codes |
| N786CK | Boeing 747-4B5 |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2020-12-04 | ValidFAA registration status code V: Valid registration. All codes |
| N351SL | Scaled Composites Llc 351 |
Fixed-wing, multi-engine | Bank of Utah Trustee Salt Lake City, Utah |
Experimental | 2019-11-05 | ValidFAA registration status code V: Valid registration. All codes |
| N709CK | Boeing 747-4B5 |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2019-04-24 | ValidFAA registration status code V: Valid registration. All codes |
| N785CK | Boeing 747-4B5 |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-12-21 | ValidFAA registration status code V: Valid registration. All codes |
| N716CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-09-19 | ValidFAA registration status code V: Valid registration. All codes |
| N707CK | Boeing 747-4B5 |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-09-05 | ValidFAA registration status code V: Valid registration. All codes |
| N708CK | Boeing 747-4B5 |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-09-05 | ValidFAA registration status code V: Valid registration. All codes |
| N715CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-08-08 | ValidFAA registration status code V: Valid registration. All codes |
| N712CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-05-31 | ValidFAA registration status code V: Valid registration. All codes |
| N713CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-03-29 | ValidFAA registration status code V: Valid registration. All codes |
| N710CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2018-03-01 | ValidFAA registration status code V: Valid registration. All codes |
| N703CK | Boeing 747-412 |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2017-11-13 | ValidFAA registration status code V: Valid registration. All codes |
| N705CK | Boeing 747-4B5F |
Fixed-wing, multi-engine | Kalitta Air LLC Ypsilanti, Michigan |
Standard | 2017-07-28 | ValidFAA registration status code V: Valid registration. All codes |
| N197UA | Boeing 747-422 |
Fixed-wing, multi-engine | United Airlines INC Chicago, Illinois |
Standard | 2013-04-01 | ValidFAA registration status code V: Valid registration. All codes |
| N718BA | Boeing 747-4H6 |
Fixed-wing, multi-engine | Boeing Aircraft Holding CO Renton, Washington |
Experimental | 2007-03-27 | ValidFAA registration status code V: Valid registration. All codes |
| N780BA | Boeing 747-409 |
Fixed-wing, multi-engine | Boeing Aircraft Holding CO Renton, Washington |
Standard | 2005-01-05 | ValidFAA registration status code V: Valid registration. All codes |
| N747BC | Boeing 747-4J6 |
Fixed-wing, multi-engine | Boeing Aircraft Holding CO Seattle, Washington |
Experimental | 2001-08-27 | 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.