Indonesian jet flew with unreliable speed readings the day before it crashed

An Indonesian rescue team member carries an airplane oxygen tube recovered after Lion Air flight JT610 crashed into the sea, at Tanjung Priok port in Jakarta, Indonesia, October 29, 2018. REUTERS/Willy Kurniawan

SINGAPORE/JAKARTA (Reuters) - The Lion Air Boeing 737 MAX jet that crashed in Indonesia on Monday flew erratically the previous evening and its airspeed readings were unreliable, according to an accident investigator and a flight tracking website.

According to data from FlightRadar24, the jet displayed unusual variations in altitude and airspeed in the first several minutes of flight after taking off from Denpasar on the holiday island of Bali on Sunday evening, - including an 875-foot drop over 27 seconds when it would normally be ascending - before stabilising and flying on to Jakarta.