In more trouble for beleaguered Boeing company, Singapore Airlines has grounded two Boeing 787-10 aircraft after issues were found in their engines. The carrier, in a statement on Tuesday, said that "premature blade deterioration was found on some engines" of its 787-10 fleet at recent routine inspections. It said that the engines would be replaced and till then, both the aircraft have been removed from service. However, the passengers are unlikely to get affected as the carrier said that it would operate other aircraft on the affected routes to minimize disruption. It said some flights were disrupted but gave no details.

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The airline has consulted engine manufacturer Rolls-Royce and the relevant authorities for next steps and any precautionary measures. This was the first airline in the world to fly the 787-10, beginning last year. The 337-seat aircraft includes 301 seats in economy and 36 lie-flat seats in business class.

Boeing 737 Max 8 aircraft have been in the news after the fatal crashes of 2 Max 8 planes, in Indonesia in October and in Ethiopia last month. Following these accidents, a number of countries have grounded the aircraft.

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Meanwhile, Boeing has said that it plans to submit a proposed software enhancement package for the grounded 737 MAX in the coming weeks. The company on Monday confirmed a statement from the Federal Aviation Administration that it would submit the upgrade later than previously announced.

"We are working to demonstrate that we have identified and appropriately addressed all certification requirements and will be submitting for FAA review once completed in the coming weeks," Boeing said. "We will take a thorough and methodical approach to the development and testing of the update to ensure we take the time to get it right."

The crashes in Indonesia and Ethiopia killed nearly 350 people after which as many as 300 Boeing 737 MAX jets have been grounded worldwide.

Last week, the planemaker said that it had reprogrammed software on its 737 MAX passenger jet to prevent erroneous data from triggering an anti-stall system that is under mounting scrutiny following the two deadly nose-down crashes. It added that even the anti-stall system, which is believed to have repeatedly forced the nose lower in the Indonesia accident, would only do so one time after sensing a problem, giving pilots more control.