I received a call today from the local FAA FSDO guy–a very nice person who has tried to help me. He had bad news–the FAA certification gurus would not authorize the removal of the EGT/CHT gauge, and its replacement with the GEM monitor. Their objection was the lack of a defined green, yellow, and red line on the GEM’s CHT display. (never mind that the CHT is not required by the certification standards for an aircraft without cowl flaps) My proposal for either a placard with red line temp, or alternatively, a red decal denoting the red line on the GEM’s bar graph was deemed not sufficient. So, the bottom line is this–you can’t remove the factory gauge. It stays. The GEM is supplemental only. Take my word for it, its on the tablets handed down from on high.
Now, what are my choices:
Remove somethinge else, perhaps the amp gauge, and put the GEM in that hole. (I could replace the amp gauge with a smaller unit, and place that on the throttle quadrant, and I’ve already got a volt gauge in the clock)
Cut a hole in the bottom of the panel through the padded trim, and install the GEM.
Fabricate a bracket.
(I’m hesitant about #2 and #3, as I don’t want to butcher the panel, or diminish the appearance of the panel–after all, I’ve had a hodge-podge look in every other airplance I’ve ever owned, and vanity rules)
- Swallow hard, and wait for ARNAV to perform.
I hope my adventure, and the money I’ve spent taking apart my panel looking for space have entertained, and helped others avoid a similar experience. Advice or opinions anyone?