NEW YORK (TheStreet) -- Shares of Boeing were slipping on Monday as a Boeing 777 Malaysia Airlines plane remains missing since Saturday and there are reports of surface of cracks found in 43 787 Dreamliner jets.

VIDEO TRANSCRIPT:

Shares of Boeing (BA) were slipping on Monday as a 777 remains missing two days after departing Kuala Lumpur for Beijing.

There is still no information on the Malaysia Airlines flight containing 239 passengers and crew that disappeared on March 8.  Teams from nine countries including the U.S. have been aiding Malaysia in its search of the Gulf of Thailand.

Authorities are not ruling out foul play in the disappearance of the 777, an aircraft that has one of the best safety records in aviation.

Boeing also was weighed down Monday by the emergency landing of a 787 Dreamliner in Hawaii on Saturday.  The Japan Airlines flight was en route from Tokyo to San Francisco when pilots shut down one of its engines following an oil pressure warning.

This came after a report in The Wall Street Journal detailed cracks that were found in more than 40 Boeing 787 Dreamliner jets.  Boeing and a supplier are inspecting the wings, which will delay deliveries to some airlines.  Last year, Boeing was forced to halt deliveries of the jet due to problems with its lithium-ion batteries.

At last check, shares of Boeing were slipping more than 2.3% to $125.56.

In New York, I'm Brittany Umar for TheStreet.

Written by Brittany Umar in New York.

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