Quantcast

Boeing's evolution of engine choices across its bestselling 737 variants

Flight made emergency landing in Denver after reported animal strike and engine fire
United Airlines doubles down on Chicago roots with new O'Hare billboards
Gatwick airport strikes, Easter 2025: will my flight be cancelled?
Boarding passes and check-in could be scrapped in air travel shake-up
European air traffic warning means summer delays for holidaymakers
The EU rule change that could affect millions of Brits when their flight is delayed or cancelled
Delta Earnings Land Soon. Why They’re Key for Airline Stocks and the Economy.
Avelo Airlines to Operate Deportation Flights, Hiring Flight Attendants
Travel chaos 2025: all the strikes and disruption expected across Europe
Qatar Airways accelerates Starlink wifi implementation
Southwest Airlines extends flight schedule through early April 2025
Cathay Pacific reaches 3,400 pilots this year, with low resignation rate of 2.9%
United receives FAA approval for first Starlink-equipped planes
Qantas launches mammoth Asia flight sale including Bali and Japan
New Update from Air Canada, WestJet, American Airlines, Delta, United, Southwest, Alaska, JetBlue Airways, and Sunwing: Airline Capacity Between Canada and US Slashed as Bookings Plummet Seventy Per Cent
Delta Cuts Two Domestic Routes
United Airlines Technicians Reject ‘Dead on Arrival’ Contract Proposal, Teamsters Say
The State of the Asia Pacific Airline Industry
Spirit Airlines to add Detroit nonstop flight out of Bradley International Airport
Major airline to launch new direct flights from Scotland to North America
Ryanair launches new ‘prime’ membership which saves passengers more than £400 a year
Judge Orders Boeing to Trial on 737 MAX Case
Qantas’ free international Wi-Fi to switch on from next week
The real reason Southwest is charging for bags now
Air France-KLM in ongoing talks with Air Europa on potential stake, CEO says
Frontier Savagely Shades Southwest After They Eliminated Longstanding Free Bag Policy, Sparking Backlash
Frontier Wants You to 'Divorce Your Old Airline' After Southwest Changes
Delta named one of Fast Company's Most Innovative Companies for sustainability initiatives
Passengers escape fiery American Airlines jet in Denver
Delta, American Dive On Slashed Outlooks; But Two Airlines Rally
Boeing's evolution of engine choices across its bestselling 737 variants
Policy
Webp 737b
Boeing 737 | Wikipedia

The Boeing 737, a popular commercial aircraft, has seen nearly 12,000 units built since its introduction in 1967. Over the years, the aircraft has evolved through different variants powered by four main types of engines.

The Boeing 737 family is divided into four sub-families: Original, Classic, Next Generation (NG), and MAX. Each sub-family represents advancements in technology and design. The Original series includes the 737-100 and 737-200 models, with the latter being more successful in sales. This was followed by the Classic series in the 1980s, which included models such as the 737-300, -400, and -500. These models improved on capacity and range.

The Next Generation series emerged amid increasing competition from Airbus and consisted of models like the 737-600 to -900. It was succeeded by the MAX family in the mid-2010s, which features certified variants like MAX 8 and MAX 9.

Get the Newsletter
Sign-up to receive weekly round up of news from Sky Industry News
By submitting, you agree to our Privacy Policy and Terms of Service. By providing your phone number you are opting in and consenting to receive recurring SMS/MMS messages, including automated texts, to that number from our short code. Msg & data rates may apply. Reply HELP for help, STOP to end. SMS opt-in will not be sold, rented, or shared.

Initially, Boeing used Pratt & Whitney JT8D engines for the Original series. These engines were known for their distinctive long and thin appearance. According to Pratt & Whitney, these engines have logged over 673 million flying hours.

For the Classic series, Boeing switched to CFM International's CFM56-3 engines. "According to CFM International," this engine is part of a family that powers various commercial and military aircraft. Its use resulted in increased efficiency and reduced noise pollution compared to its predecessor.

The NG series continued using CFM International engines but upgraded to the CFM56-7 model. This engine offered better fuel efficiency and power compared to earlier versions. CFM International notes that this combination became "the most popular engine-aircraft combination in commercial aviation history."

Finally, for the MAX series, Boeing opted for a new design with CFM International's LEAP-1B engine. Despite challenges such as a grounding period due to accidents involving MAX aircraft, Safran reports that LEAP-1B engines have already accumulated over 60 million flight hours across more than 160 operators globally.

Organizations Included in this History
More News

Air India announced on X that flight AI171 from Ahmedabad to London Gatwick was involved in an accident shortly after takeoff.

Jun 16, 2025

Lufthansa Group Airlines has introduced new digital functions aimed at enhancing the travel experience for passengers.

Jun 16, 2025

ITA Airways announced on X that a radar failure at Naples Capodichino Airport may cause severe delays and cancellations, advising passengers to check flights online before traveling.

Jun 13, 2025

Emirates has announced the launch of three weekly flights to Siem Reap, expanding access to Angkor Wat and other cultural attractions via Dubai and Bangkok.

Jun 13, 2025

Japan Airlines has announced an autumn tour around Hokkaido, featuring chartered trains, buses, and regional bento meals.

Jun 13, 2025

EVA Air has announced its "Escape to Paradise" campaign on the social media platform X, promoting flights to Bali and highlighting the island's beaches, jungles, and culture.

Jun 13, 2025