[mshac]

When I was under the pedestal, I noticed the elev. trim indicator had a fitting at the bottom for a flange-base bulb to illuminate it with the panel. Me, being OCD about all bulbs working, have spent an hour or more trying to figure what type bulb goes there. A 387 bulb is the right shape, but its flange base is only 5mm, whereas this bulb would be closer to 10mm at the base.

Parts catalog makes no mention of this bulb, only an "edge light assembly" which I assume includes this bulb. See photos from parts manual for reference.

There was no bulb in the socket, so if anyone can shed some light on this mystery bulb, it would be greatly appreciated!