A new software problem has been found in the troubled Boeing 737 Max jet series.
The plane series has been grounded since March after two deadly crashes in less than six months.
The aircraft manufacturer announced June 26 that the Federal Aviation Association has identified an additional requirement for software changes.
Government test pilots tested the Boeing’s updated Max software in a flight simulator last week and found a flaw that could cause the plane’s nose to pitch down.
The latest setback is likely to delay the plane’s return to service for possibly as much as three months although the plane had no set timeline of return.