Is MCAS Only Used On The Boeing 737 MAX?

The system had already been featured on another Boeing aircraft before the MAX entered commercial service.
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Ethiopian Airlines crash: What is the MCAS system on the Boeing 737 Max 8?

Similarities between the Lion Air and Ethiopian Airlines crashes, confirmed by black box data, have focused attention on an anti-stalling system used in the new Boeing 737 Max 8 aircraft. Both the ...