Pratt & Whitney's Engines

Maintenance - Aviation Industry

Pratt & Whitney’s JT8D Series Engine

Pratt & Whitney introduced the JT8D to commercial aviation in 1964 with the inaugural flight of Boeing's 727-100 aircraft. Many variants of the JT8D family have been produced, covering the thrust range from 14,000 to 17,400 pounds and powering 727, 737, and DC-9 aircraft. More than 11,800 JT8D standard engines have been produced, accumulating over 600 million hours of service operation.

The JT8D-200 series covers the 18,500- to 21,700-pound thrust range and is the exclusive power for the popular MD-80 series aircraft. Since starting service in 1980, more than 2,900 JT8D-200 engines have been produced. 

PWA JT8D - Series

To ensure the JT8D-200 stays current with environmental regulations, Pratt & Whitney has developed a new low-emissions combustion system, or E-Kit, that is FAR 25-certified.  The E-Kit reduces JT8D-200 NOx emissions by 25 percent, unburned hydrocarbons by 99 percent and smoke by 52 percent.  The E-Kit exceeds all ICAO standards for new production engines and qualifies for the Swiss Class 5 (cleanest) emissions category.

P&W and Aviation Fleet Solutions (AFS) have jointly developed a noise reduction kit for JT8D-200 powered MD-80 aircraft. The kit enables operators to comply with Chapter 4 noise standards while maintaining thrust and performance levels, and was FAA/EASA certified

Engine Specifications:

Fan tip diameter: 39.9 - 49.2 inLength,

flange to flange: 120.0 - 154.1 in

Takeoff thrust: 14,000 - 21,700 lb

Flat rated temperature: 77 - 84° F

Bypass ratio: 1.0 - 1.7

Overall pressure ratio: 15.8 - 21.0

Fan pressure ratio: 1.92 - 2.21

( Source : Pratt & Whitney )  

 

Pratt & Whitney’s JT9D Series Engine

Pratt & Whitney's JT9D engine opened a new era in commercial aviation: the high-bypass-ratio engine to power wide-bodied aircraft. As Pratt & Whitney's first high-bypass-ratio turbofan, it introduced many advanced technologies in the areas of structures, aerodynamics and materials to maximize fuel efficiency and component durability. 

The JT9D family of engines consists of three distinct series. The JT9D-7 engine covers the 46,300- to 50,000-pound-thrust range, and the JT9D-7Q series has a 53,000 pound thrust rating. Later models, the -7R4 series, cover the 48,000- to 56,000-pound-thrust range. These three engine types power 747, 767, A300, A310 and DC-10 aircraft. For JT9D-7R4 twinjet installations, the engines are approved for 180-minute ETOPS (Extended-range Twin-engine Operations).     

Pratt & Whitney continues to invest in and support the JT9D family of engines. Upgrade programs are in place to enable operators to improve durability, increase thrust and reduce noise. The upgrade programs are known as the JT9D Reduced Cost of Ownership Kits.  Three kits are available to help JT9D customers extend on-wing time, increase EGT margin and provide an improvement in TSFC.  The JT9D-7J durability kit contains T1 and T2 blades along with a full set of compressor blades and miscellaneous hardware.  The JT9D-7Q HPT kit includes T1 and T2 blades and vanes along with the T2 Lenticular seal assembly. The JT9D HPC kit includes the fifth to fifteenth stage compressor blades.  This kit is common for the JT9D engine and therefore applies to the entire JT9D fleet.

With Pratt & Whitney's commitment to the JT9D program, these engines will continue to serve commercial aviation well into the 21st century.

Engine Specifications

Fan tip diameter: 93.4 in

Length, flange to flange: 132.7 in
Takeoff thrust: 48,000 - 56,000 lb
Flat rated temperature: 86° F
Bypass ratio: 5.0
Overall pressure ratio: 23.4 - 26.7
Fan pressure ratio: 1.67                

 

Pratt & Whitney’s PW 2000 Engine

Pratt & Whitney's PW2000 engine covers the mid-thrust range from 37,000 pounds to 43,000 pounds.  The PW2000 powers all models of the twin-engine Boeing 757, and is the exclusive power as the F117 for the four-engine C-17 Globemaster III military transport. 

The PW2040 model also power’s the U.S. Air Force’s C-32A, the military version of the 757

The PW2000 engine entered revenue service in 1984 as the first commercial engine with FADEC (Full-Authority Digital Electronic Control) technology.  Pratt & Whitney introduced an improved version of the PW2000, the Reduced Temperature Configuration (RTC) in 1994. This enhanced model offers improved reliability and durability for long on-wing times and reduced total maintenance cost, along with excellent environmental performance.

The PW2000 is approved for 180-minute ETOPS (Extended-range Twin-engine Operations) and meets all current and proposed noise and missions regulations worldwide.  

Engine Specifications

Fan tip diameter: 78.5 in
Length, flange to flange: 141.4 in
Takeoff thrust: 37,250 - 43,000 lb
Flat rated temperature: 87° F
Bypass ratio: 6.0
Overall pressure ratio: 27.6 - 31.2
Fan pressure ratio: 1.74

 

Pratt & Whitney's PW4000-94 Engine

Pratt & Whitney's PW4000-94-inch fan model is the first in a family of high-thrust aircraft engines. With certified thrust ranging from 52,000 to 62,000 pounds, it powers the Airbus A310-300 and A300-600 aircraft and Boeing 747-400, 767-200/300 and MD-11 aircraft. For twin-engine aircraft, the PW4000 is approved for 180-minute ETOPS (Extended-range Twin-engine Operations), giving airlines excellent operational flexibility.  There have been over 2,150 engines produced, which are providing dependable power for airlines around the world. 

Since entering revenue service in 1987, the PW4000 has offered airlines excellent operating economics and high reliability. Advanced, service-proven technologies, such as single-crystal superalloy materials and its Full-Authority Digital Electronic Control (FADEC), contribute to superior fuel economy and reliability. The engine's benefits are further enhanced by excellent performance retention, long on-wing times and low maintenance costs.

The PW4000’s noise and emissions parameters are lower than levels required for all current and anticipated emissions and noise regulations. For a further reduction in emissions, Pratt & Whitney’s TALON (Technology for Advanced Low NOx) combustor technology is now available for the PW4000. Derived from the 112-inch fan model, TALON has segmented, replaceable liner panels for easy maintainability and air blast fuel nozzles for excellent fuel atomization and mixing resulting in clearer burning and low emissions.

Engine Specifications

Fan tip diameter: 94 in
Length, flange to flange: 132.7 in
Takeoff thrust: 52,000 - 62,000 lb
Flat rated temperature: 86 or 92° F
Bypass ratio: 4.8 - 5.0
Overall pressure ratio: 27.5 - 32.3
Fan pressure ratio: 1.65 - 1.80   

  

Pratt & Whitney's PW4000-100 Engine

Developed specifically for the Airbus A330 twinjet and introduced in 1994, the PW4000 100-inch fan engine has thrust capability from 64,500 to 70,000 pounds at take-off.

Offered as a complete propulsion system, the PW4000 100-inch fan engine features the industry’s lightest weight and most advanced nacelle. It also incorporates a number of service proven technologies in materials, aerodynamics and controls to enhance performance, reliability and durability. The engine was the first in aviation history to qualify for ETOPS (Extended-range Twin-engine Operations) prior to entering service. It is now approved for 180-minute ETOPS. And it meets all present and anticipated noise and exhaust emissions regulations. The engine is built to provide maximum value and its success is reflected by its service experience in the A330 market. 

Pratt & Whitney is taking its successful PW4000 engine for the Airbus A330 to new heights with the introduction of the PW4170 Advantage70™. This program includes upgrades that enhance engine performance, save fuel, increase durability and reduce maintenance costs. 

Advantage70 reduces fuel consumption over the baseline PW4168A engine by one percent, providing a direct savings of about $140,000 per aircraft per year. The fuel savings also means that each Advantage70-powered aircraft reduces its output of carbon by about 1.5 million pounds per year.  Both the PW4168A and PW4170 meet regulatory noise level requirements with margin and produce the lowest total emissions compared with other engines powering the A330.

The PW4170 Advantage 70 is offered both as a new engine and as an upgrade to existing engines. The upgrade includes a package of technology enhancements which can be incorporated in your operators’ fleets during engine overhaul. The Advantage 70 upgrade is headed by a new high pressure compressor (HPC) ring case based on successful designs used on other members of the PW4000 family. The upgrade will lower fuel burn to provide best-in-class fuel efficiency and extend maintenance intervals.New Pratt & Whitney PW4170 engines will enter service in 2009, starting with A330-200 freighters.  As a leading OEM and MRO service provider, Pratt & Whitney is uniquely capable of developing ongoing improvements that reflect the company’s Green Engine program. Today, the PW4000 100-inch engine manual offer green alternatives for 76 percent of the listed repairs and replacements.

Engine Specifications

Fan tip diameter: 100 in
Length, flange to flange: 163.1 in
Takeoff thrust: 64,500 – 70,000 lb
Flat rated temperature: 86° F
Bypass ratio: 5.0
Overall pressure ratio: 32.0-35.4
Fan pressure ratio: 1.75                      

Pratt & Whitney's PW4000-112 Engine

The PW4000 112-inch fan engine, the second derivative model in the PW4000 engine family, was the launch engine for Boeing's 777 super twinjet. Certified at 86,760 pounds thrust, the engine entered service in 1995 with United Airlines already qualified for 180-minute ETOPS (Extended-range Twin-engine Operations).  It is also the first engine to operate with approval for 207-minute ETOPS. The PW4090, certified at 91,790 pounds of thrust, entered service on the Boeing 777-200ER airplane in 1997. 

The engine incorporates service-proven advanced technologies to enhance operational durability and improve environmental performance. These include the industry's most advanced single-crystal superalloy materials, powdered metal disks, TALON (Technology for Advanced Low NOx) combustor technology, and an improved Full-Authority Digital Electronic Control (FADEC). Recently, durability upgrades have been incorporated into the High Pressure Turbine allowing the operators to increase time on wing which is key in lowering maintenance costs

The PW4000 112-inch fan engine retains the excellent accessibility and component modularity of other PW4000 family members to reduce maintenance time and cost. For transportability, the engine can be shipped in a 747 freighter as a complete engine. Also, the fan case is easily separated from the engine's core for split shipment without affecting the bearing compartments.

Engine Specifications

Fan tip diameter: 112 in
Length, flange to flange: 191.7 in
Takeoff thrust: 74,000 - 90,000 lb
Flat rated temperature: 86° F
Bypass ratio: 5.8 - 6.4
Overall pressure ratio: 34.2 - 42.8
Fan pressure ratio: 1.70 - 1.80  

   

Pratt & Whitney's PW6000 Engine

Entering service in 2007, the PW6000 is Pratt & Whitney’s newest product-line entry.  This new engine covers the 18,000- to 24,000-pound thrust class and is targeted for 100-passenger aircraft.  It is currently offered on the Airbus A318, which is part of the successful A320 aircraft family.  

PW6000 builds on proven technology from other Pratt & Whitney advanced engine programs to deliver the lowest cost of ownership for 100-passenger aircraft operators.  Pratt & Whitney has incorporated technological advances in the PW6000 that enable a reduction in parts count for lower acquisition cost as well as a reduced maintenance cost.    

The PW6000 meets all current and anticipated noise and environmental regulations.  The PW6000’s reduced noise provides revenue benefits as the engine enables flights into many airports that have curfews, noise quotas and other restrictions.

Prior to entering service with LAN Airlines in 2007, the PW6000 completed more than 29,000 cycles and 14,000 hours of development testing.  This extensive testing and demonstration has allowed the PW6000 engine to obtain ETOPS qualified status at entry into service.

For airlines contemplating the future acquisition of new 100-passenger aircraft, the PW6000 is an excellent choice as it was specifically designed for high-cycle operation in the demanding short-haul aircraft market.  The PW6000 meets the challenges of low cost, clean, quiet, reliable, and durable power for airline customers.

Engine Specifications

Fan tip diameter: 56.5 in
Length, flange to flange: 108 in
Takeoff thrust: 22,000 - 24,000 lb
Flat rated temperature: 86° F
Bypass ratio: 4.9
Overall pressure ratio: 26.6