Ex-Boeing Quality Manager Warns of 737 Plane Being Back Air So Soon

Boeing's 737 planes are being given the green light to get back up into the sky -- but a guy who used to do quality assurance for them says ... it might be too soon, not safe enough.

We talked to former Boeing quality manager John Barnett -- who came on "TMZ Live" Wednesday to discuss the fact that his old company has said their 737 Max 9 aircrafts are ready to hit the runway again ... this just a few weeks after the Alaska Airlines incident.

The speed at which this has all unfolded has alarmed many, and John here is right there with them in the concerned department ... and his reasoning lies in his personal experience.

Watch what he has to say for yourself -- John explains how things ran when he was in the field and how they've allegedly changed. Based on what he's claiming here, it's troubling, 'cause he suggests cutting corners is something the industry at large has leaned into.

John claims that inspection operators and experts have been getting slashed from assembly lines in recent years -- an awful trend that he suspects has only continued since he left.

With this in mind, he questions whether the 737s are, in fact, as good to go as Boeing insists ... because in his mind, he thinks more due diligence is warranted -- just in case, of course.