Boeing (BA - Get Report) said Sunday that it's wrapping up development of a software update and revised pilot training following the crash a week ago of its 737 MAX 8 jet in Ethiopia

The fixes will address issues in how software systems respond "to erroneous sensor inputs," said the company in a statement.

The crash had killed 157 passengers and crew and appears consistent with an accident in October of a Lion Air flight that crashed in Indonesia, and on Sunday, it was reported that investigators in Ethiopia had found similarities between the two accidents. 

"We also continue to provide technical assistance at the request of and under the direction of the National Transportation Safety Board, the U.S. Accredited Representative working with Ethiopian investigators," said the statement by chief executive Dennis Muilenburg, who also said that "first and foremost, our deepest sympathies are with the families and loved ones of those onboard Ethiopian Airlines Flight 302."