Boeing did not disclose 737 MAX alert issue to FAA for 13 months

Employees walk by the end of a 737 Max aircraft at the Boeing factory in Renton,US. (Reuters)

Boeing Co (BA.N) did not tell US regulators for more than a year that it inadvertently made an alarm alerting pilots to a mismatch of flight data optional on the 737 MAX, instead of standard as on earlier 737s, but insisted on Sunday the missing display represented no safety risk

The US planemaker has been trying for weeks to dispel suggestions that it made airlines pay for safety features after it emerged that an alert designed to show discrepancies in Angle of Attack readings from two sensors was optional on the 737 MAX.