For long, there has been a lot of discussion about Boeing 787's sudden grounding and now it has been found that a lithium ion battery was apparently not wired properly, which led to the entire mess.

It has been cleared on Wednesday, after a long investigation by the Transport Safety Board, that the battery of the aircraft's auxiliary power unit was improperly connected with the main battery that overheated.

Nonetheless, they feel that a lot more needs to be done to know what caused the main battery to excessively heat that it started smoking, which pushed for emergency landing of the ANA domestic flight and the worldwide

grounding of Boeing 787 jets on Jan 16. There are discussions going on between the agency and Boeing about the same issue.

Moreover, there are many airlines which are facing inconvenience due to 787 Dreamliners grounded. United, the only US airline that operates Boeing's cutting-edge aircraft said that they are making separate schedule for planes through March 30 after its seven 787 Dreamliners have been standing idle.

"We will make further adjustments in the future as we gain more visibility on the question of when service will be restored", said Christen David, a spokeswoman for United, in an email.