I got a call from a guy at the FAA yesterday. I should be receiving in a few days the action information and comment information on a new area of concern for them - the left side mounted mag switches - where several have been inadvertently shut off in flight one causing a broken back. At that time I will get it posted. Meanwhile, I told him I would solicit comments and send him the link to the thread regarding the issue.
Here are the things I discussed with him:
1. I don't know what year they changed from what he called the "chicken head" switch (which is really an amplifier knob term, "chicken foot" as the old rotary mag switch does not really look like a chicken foot does) to two toggle switches, but they are concerned about both.
2. Most folks move the switches to the panel when they do a rebuild. It just makes it easier to remember to get the mags off, and the wiring is cleaner.
3. Of course, they would like to see a keyed switch or something like the rotary on the panel. I informed him that most people put a semi-guarded set of two toggle switches on the panel.
4. He said the cause of the shutoff was getting clothes caught in the mag switch.
5. I suggested an SB rather than an AD. He said that mechanics told him those don't work in Alaska, that to get compliance it has to be an AD.
6. Alaska is the state where this originates, as apparently the back injury occured there.
7. Obviously, compliance of running a couple new wires and putting in a couple toggles is not terribly onerous, but I also mentioned that some folks would prefer not to comply who have restored planes for historical purposes.
So rather than get all crabby about another potential AD, let's offer some constructive comments and suggestions here - you may choose to wait for the "official" information before commenting, but the above is the gist of it.