Boeing (BA - Get Report) shares are being grounded Tuesday, falling 1.5% to $348.41, after the company reported a 56% drop in May deliveries due in part to a decline in its formerly top-selling 737 MAX jets. 

Boeing delivered 30 planes during the month, down from the 58 planes it delivered a year ago during the same period. 

The plane has been blacklisted since a fatal Ethiopian Airlines crash in March, the second crash the plane experienced in a six-month period. All 157 passengers on board were killed in the crash. Since then, deliveries of the jet were stopped.

American Airlines (AAL - Get Report) said that it was canceling 737 MAX jet flights through Labor Day, while United Airlines (UAL - Get Report) and Southwest Airlines (LUV - Get Report) have canceled flights using the jets at least through early August. 

The tide may be turning on consumer sentiment about the jet, according to a new IBD/TIPP poll.

A survey that was conducted between May 30 and June 7 found that 61% of Americans are following the Boeing crisis closely vs 69% who reported following closely in the period between March 28 and April 6. 

Of those following the news closely, 48% said they would avoid flying on the plane, that is down from 51% in the previous poll. Meanwhile 48% said they were likely to fly on the jet, up from 45% in the previous survey.