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Aviation

Aviation

Engine manufacturer Pratt & Whitney says he is working on a solution

  Swiss International Air Lines Airbus A220-300

A Swiss International Air Lines Airbus A220-300 Image: EvrenKalinbacak / Shutterstock.com

Software alterations have been reported as the cause of Airbus A220 aircraft problems that led to at least three emergency landings after excessive vibration caused engine failures, according to reports.

Financial Newswire Reuters reported that "recent changes in engine software … may have caused parts that compress the air inside the engine to be configured in a way that caused mechanical resonance or destructive vibrations," citing familiar sources. With an ongoing investigation.

That investigation is investigating why airlines, in particular Swiss International Air Lines (SIAL), are having problems with their new A220. SIAL has been greatly affected by problems with the new Pratt & Whitney PW1500G engines in its jets; The airline has had three engine failures since buying the A220 three years ago.

SIAL pilots have been instructed not to use "certain combinations of thrust and altitude settings" until the root cause of engine failures has been found, including a finger search of the French fields where it is believed that parts of a damaged PW1500 engine have fallen to the ground since a hit A220. It is also wise to wait until a software patch is issued to correct the underlying flaw.

"Clearly, every time you have a problem like this, we are aware. The guys are working to fix it," Pratt & Whitney chief executive Greg Hayes told analysts at a conference call.

Engine failures in modern turbo fan passenger planes are rare, hence the protest on the ground of aviation. In 2015, Pratt & Whitney, manufacturer of the PW1525G engine option available for the A220 (the basic PW1500 model is available in four different versions), told aviation trade mag Flight Global that it was testing an update of software for the engine that would increase its thrust power without the need for any "hardware" changes. Veep Graham Webb said this would mean running at higher temperatures, which would increase maintenance costs.

An aviation blogger recently claimed that an Air Baltic executive told him that the Latvian airline had made 50 engine changes in its A220 between December 2016 and October 2018. The A220, formerly known as Bombardier C-Series, It only entered the commercial revenue service in June 2016. Air Baltic currently has 20 A220 and the calendar described would have been when the new planes were first delivered to the airline

The aircraft engines are designed to run for thousands or even tens of thousands of hours in the wing between changes, giving them an expected flight time that is usually measured in months or years. The archrival of Pratt & Whitney, CFM International, boasted in 2003 that one of its CFM56 engines had spent more than 40,000 hours on the wing (four and a half years of engine running alone, not counting the time parked ( during the night) without needing to be removed for maintenance.

The two fatal accidents of the Boeing 737 Max threw software problems on passenger planes, and today an Indonesian report was published on the causes of the second accident. Not long ago, Airbus advised the operators of its A350-941 aircraft to turn them off and off every 149 hours, while in 2015 the Boeing 787 Dreamliner infamously suffered a similar memory overflow error that ran the risk that On-board generators will turn off in flight. ®

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