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An update for you all and a thanks for your input.
The FAA does require a DER signoff for a new hole in the firewall of a P-series as none of the existing holes appear usable.
Mind you any time you meet a nice FAA inspector and he agrees to the Field Approval, I think you should be thankful.
If anyone is interested, in the future, I will have a data package and a signed 8110-3 that will allow half inch holes to be placed in the upper passenger side front firewall and upper pilot side rear firewall with approved data and installation instructions.
As I mentioned, he was a very nice fellow and made a number of very good and sensible suggestions about paperwork and the aircraft.
One that was of particular interest was his strong suggestion to install a CO Detector on the panel. (Janitrol Heaters being the reason)
In researching what is available, I see Aircraft Spruce has an Areo-352, P/N 13--1642, a small panel mount unit that looks good. I know AvWeb did a report on some units, but has anyone had any experience with the Aero-352 units?
On the discussion about graphic engine monitors, I took the JPI 760 w/fuel flow as it was a direct replacement for the Shadin and minimizes the use of panel space, already tight. It also gets the gauge right in front of me (above the IFCS) so I can see what is going on.
The note about the OAT is interesting. Here in England in the winter you can be flying along IFR in cloud, in well above freezing temps and then hit a cold pocket and get a lot of ice very quickly. That happened to me on a recent night flight with the boots U/S at the time. There was some excitment as I had already decended to the sector MSA in prep for the approach. We were close enough to the airport to get vectors direct and a decent to get into warm air. I am going to use the OAT and alarm it so at least I know when it is about to happen.
Regards - Dave Underwood
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