Originally Posted by
Lux Flyer
Every one of the 737-900's would have undergone multiple heavy maintenance checks since being delivered over a decade ago which means the bolts/plug would have been inspected multiple times. If there was a systemic issue in the design where the bolts are becoming loose over time, it would have been identified multiple times over by now. My understanding is the 7M9's that have been found with loose bolts are more recent deliveries that haven't had the heavy maintenance checks which would have required exposing the plug behind the interior paneling, so the bolts are likely still in whatever state they came on delivery.
can you imagine if every Ram 1500, F150, GM product was recalled ever built, because something happened on only recently built models? Maybe a poor example but a 172/182 or current examples of aircraft that are older than 737’s, currently still popular and doing just fine with modernization once in a while. They work because they do.
Something happened, but the loose bolts found on UA and AS are only related to the Max, or likely recent builds. As much I hate 737’s, this isn’t going to be the death of it.