Air Canada Boeing plane bursts into flames seconds after taking off

[usonian]

5. More for aviation deectives.

Last edited Sat Jun 8, 2024, 12:20 AM - Edit history (1)

The 777-300ER uses one of three engine manufacturers.
I can't figure which one, even at Air Canada's website.
See which aircraft engine plant is open late Friday and over the weekend!

From the MSN article:
Emphasis mine.

According to Global News, this was the second incident that took place at Toronto Pearson Airport shortly after take-off in the last two weeks.

On May 27, a flight leaving Toronto heading to Delhi, India encountered an engine issue that forced the plane to reroute.

The Boeing 777-300ER has been with the airline since March 2008, according to Media Drum World.

Air Canada has 19 of those aircraft, all of which are in active service.

Could be FOD? (foreign object damage)


https://planenerd.com/engines-for-boeing-777/
The Engines for Boeing 777: A Closer Look ( date? I can't see one, even with extensions turned off)
The popular Boeing 777 is a revolutionary aircraft. Here are the three engines that powered its success.

The Triple Seven was the first commercial aircraft that was designed entirely via a computer. Guiding its takeoff to instant airline popularity were three powerful engines for the Boeing 777: the General Electric GE90, the Rolls-Royce Trent 800, and the Pratt & Whitney PW4000.
...

General Electric developed their GE90 engine specifically for the Boeing 777, and it is the most powerful airline engine in the world. Its advanced composite fan blade technology made it a pioneer when introduced into service in 1995.

The most popular 777 engine, however, is the Rolls-Royce Trent 800. It has secured orders for 40% of the Boeing 777 market. This tremendous popularity of the Trent 800 is partly due to its low weight. Rolls-Royce says a Trent 800-powered Boeing 777 is 8.000 (3.628,7 kg) lighter than one with the GE90.

The Pratt & Whitney PW4000 is older but still contemporary with the GE90 and Trent 800. Pratt & Whitney has steadily increased the thrust since its introduction on the Boeing 777 in 1995. The low emission and noise levels have complimented the excellent reliability that matches the GE90 and Trent 800.

More from Wikipedia (much more)
https://en.wikipedia.org/wiki/Boeing_777

Boeing hints that the GE engine may be the one, though others say that the Rolls is popular.

https://secure.boeingimages.com/archive/Boeing-777-300ER-Engine-Nacelle-Above-Clouds-2F3XC5LXR3N.html

GE Aircraft Engine's GE90-115B engine powers the 777-300ER. Each engine produces 115,000 pounds of thrust -- nearly a quarter of a million pounds of total thrust for the airplane. By comparison, the original 777 had 75,000 pounds of thrust per engine. GE90-115B engines have been recognized as the world's most powerful commercial jet engines and currently hold a Guinness World Record for thrust. All three types of engines offered on the 777 have excellent fuel efficiency, allowing the 777 to be as quiet as a 767 even though the 777 engines provide 40 percent more power. Key factors in this performance are new, larger-diameter fans with wide-chord fan blade designs and bypass ratios ranging from 6-to-1 to as high as 9-to-1. This compares to the typical 5-to-1 ratio for the engines of previous twin-aisle jets.

Cautionary Tale
https://www.aerotime.aero/articles/24467-faa-issues-emergency-ad-boeing-777-300er-ge-engines

The Federal Aviation Administration (FAA) issued an emergency airworthiness directive (AD), warning Boeing 777-300ER powered by GE engines of a potentially unsafe condition affecting the power plants. This is the second emergency AD, which follows an uncontained engine fire incident back in October 2019.

The emergency AD, issued by the FAA on January 17, 2020, orders operators to have interstage seal removed from General Electric Company GE90-110B1 and GE90-115B model turbofan engines, listing 16 serial numbers. The AD comes in addition to a previous emergency AD, which listed eight engine serial numbers.

The requirement follows investigative findings into October 2019 event, during which a Boeing Model 777-300ER, powered by GE GE90-115B model turbofan engines, experienced an uncontained high-pressure turbine (HPT) failure. As a result, the aircraft suffered damage and had to abort a takeoff.

Link to the directive is stale.

Disclainer: I worked for a while at G.E. Aircraft Engine Group, on engines that could fit on your dining table. Interestingly, one project was to evaluate a third-party's optical blade tip-clearance sensor.

In researching this post, I found that NASA is evaluating a microwave-based tip clearance sensor.

https://c3.ndc.nasa.gov/dashlink/static/media/other/AvSafe_2009_IVHM_Weds_AM_Woike.pdf (PDF 1.1MB)


snip

The capability to make in-situ health measurements on a turbine engine is a need that has been identified by the IVHM community
– High Pressure Turbine (HPT) and High Pressure Compressor (HPC) sections

• Why is it needed?
– No sensor is currently being used in these areas now that can directly monitor blade & disk health
– Currently rely on secondary measurements and scheduled based inspection & maintenance

State-of-the-art for other clearance sensors:
- Optical --- Most accurate but more applicable for use in labs, require complex cooling for high temperature usage
- Eddy Current --- Tend to be limited in frequency response and at temperature ~1000°F (540oC)
- Capacitive --- Competing technology. Seems promising. However commercially available products are somewhat limited in frequency response

Linked in one of the above articles: (probably unrelated)
https://www.dailymail.co.uk/sciencetech/article-13444467/Boeing-plane-United-American-Airlines-fatal-fault.html
By MATTHEW PHELAN SENIOR SCIENCE REPORTER FOR DAILYMAIL.COM
PUBLISHED: 17:30 EDT, 22 May 2024 | UPDATED: 12:38 EDT, 7 June 2024

In this March 2024 airworthiness directive (AD) proposal, the FAA warned Boeing of an 'electrostatic discharge,' or static electricity risk, near the center-wing fuel tanks.