It will come out through the oil drain plug hole. Remove plug and drain oil. Fish cushion with safety wire through the drain hole until it can be seen. Use small "mechanical fingers" or hemostats to get ahold of the end of the cushion and it will come out. It takes patience and a lot of four letter words but it can be done.
Dave
Even if you drain the oil the borescope will typically get coated with oil from rubbing against surfaces and not be of much use. Also really hard to fish areound in the sump from the drain hole because it?s not at all flat inside.
My suggestion is to drain the oil and then jury rig some small flexible tubing up to a shop vac and go fishing down the mag whole that the pad was lost in. It?s got to be pretty much straight down in the sump unless it got caught up on a gear in the accessory case.
Good luck. Worst case is you pull the sump. No fun but not the end of the world either
You could try removing the oil filler tube and have a look from above. I did this and found something successfully in the sump for one silly mistake that I'd like to forget.
Harbor Freight and Lowe's came through! used to do a lot of endoscopy, but this was made more difficult by not having the grabber tool pass through the endoscope.
Very easy to visualize with the oil drained, 15 minutes of trying after bending the grabber to the right position, and dragged it up the magneto hole.
Mags replaced, oiled up and ready to go - only lost a day or so of productive work - thanks all for the suggestions!