I wonder if this could be related.?
https://www.straitstimes.com/asia/se...light-incident
KUALA LUMPUR - The Civil Aviation Authority of Malaysia (CAAM) will probe the flight data of a Malaysia Airlines flight involving a Boeing 737-800 plane after it
allegedly dove suddenly and flew erratically before turning back on Sunday (April 3).
CAAM chief executive Chester Voo Chee Soon said the authority would be reviewing the internal flight data monitoring system of Flight MH2664 to get to the bottom of the issue.
"Preliminary data has shown correct responses by the operating crew following the issue onboard," Captain Voo said in a statement on Tuesday.