But why not? The 737NG has a known issue that killed someone in 2018 and the fix isn’t even planned to be in place until 2028.
https://www.aerotime.aero/articles/faa-mandates-boeing-737ng...
> That includes a new spacer design for the engine inlet with increased fastener capability, changes to the fan cowl and fan cowl support beam, and the implementation of new exhaust nozzle structural stiffening elements.
> According to the National Safety Transportation Board’s (NTSB) executive summary of the incident, parts “of the left engine inlet and fan cowl separated from the airplane, and fragments from the inlet and fan cowl struck the left wing, the left-side fuselage, and the left horizontal stabilizer”. One of the fragments of the cowl struck the fuselage near a cabin window, with the window departing the 737-700 and resulting in rapid depressurization.
And this loose bolts thing shows up on a plane model where the "driving controls" were designed wrong.
Note that no one is complaining about the other Boeing 737 models.