From a software perspective (I spent a lot of time writing software for CAD systems and CNC equipment), the combination of certain latitude/longitude values and 270 degrees (which is Pi in Radians) sounds like a classic divide-by-zero problem.
We had a potentially less dangerous issue with a CAD system that could show the tool path of the generated CNC. The CAD system shared the path formulas with the CNC equipment and for a certain "design", the CAD system showed the tool immediately jumping to a location about two inches away. This had never been observed on the CNC equipment after years of operation. We loaded the same CNC into the milling machine without a tool or work piece and sure enough, the same instruction/coordinate combination caused the mill to jump those two inches at its maximum feed-rate. Needless to say, finding and fixing this bug became our top priority!
This seems like lazy, half-baked criticism.
How about "Some Boeing 737's cant land on some runways due to programming issue"
The current title is literally incorrect, they can all land due west just fine except for some particular runways
Obviously the problem has something to do with the 270 degree heading. Obviously the FAA is saying so. You're just making the headline confusing and uninteresting by omitting that.
Making an interesting point with imperfect precision is better than failing to say anything interesting at all.
I agree that "West" could have been improved by replacing with "some runways with a due West heading" but entirely dropping the interesting point, as the headline does now, is a cure worse than the disease.
If they'd read the whole PDF, they might have seen these bits:
"All six display units (DUs) blanked with a selected instrument approach to a runway with a 270-degree true heading, and all six DUs stayed blank until a different runway was selected."
And:
"An unsafe condition exists that requires the immediate adoption of this AD without providing an opportunity for public comments prior to adoption."
That's pretty serious, and indeed fits exactly with "some Boeing 737s can't land due West."