Bailey Moyes 912 Dragonfly, Maintenance Manual

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Congratulations on your purchase of Grand Rapids Technologies' Engine Information System (EIS). We are pleased that
you have chosen our product to meet your aircraft instrumentation needs. You will find this system will enhance your
flying pleasure while increasing your level of safety.
1. Read This First!
Note for those upgrading the software with a new computer chip. After installing the chip, it may be initialized
to factory default settings by pressing and holding the right button when turning the instrument on. After a delay
of a few seconds, this will set the user-defined pages to the factory configuration.
Advice Before Starting Your Installation: Three steps to make your installation easier.
Step 1. Determine how you would like to arrange your EGT/CHT connections. The EGT/CHT inputs are
numbered 1-4 (1-6 for the Model 6000). You may simply connect EGT1 & CHT1 to cylinder number one
(according to the engine manufacturer’s cylinder numbering). This is common, and works well. For four-
cylinder engines there is also an alternate method. You may wish to connect the EGTs and CHTs so they
correspond to their position on the digital display pages. That is, connecting EGT 1 & CHT 1 to the front left
cylinder (since it appear on the top left position of display page), EGT 2 & CHT 2 to the front right cylinder
(since it appears on the top right position of the display page), and so on. (Figure 1 illustrates the position of the
data on the display pages.) Either option works well, although personally the latter method is easiest. The main
point is to make sure you know which cylinder corresponds to each of the readings on the instrument so that you
will perform maintenance on the correct cylinder when it becomes necessary.
Step 2. Plan which functions you will wire to each of the 4 auxiliary inputs. Recall that manifold pressure, fuel
pressure, fuel level, vacuum, coolant pressure (and any others that do not have a dedicated input to the
instrument) must be connected through the auxiliary inputs. (The auxiliary inputs may be used for other
functions also, but these are the most common uses.) The only significant consideration concerns the position of
the auxiliary input functions on the labeled pages. Referring to figure 1b, you will note that auxiliary 1, 2, & 3
appear on page 12, and auxiliary 4 appears on the next page. You may prefer to see two or three auxiliary
functions on the same page (for example, left and right fuel levels). This will require wiring them to the first
three auxiliary inputs.
Step 3. Remember that you have complete control over what will be displayed on the two combination pages,
and the digital data displayed on the bar graph pages. You will find this useful for conveniently displaying the
exact data you would like available during your flight
…now on to the installation!
2. An Overview of Installation & Setup
Installation of the EIS includes the physical mounting of the instrument into the airplane’s instrument panel,
making the electrical connections from the pre-wired cables to the various sensors, and finally setting entries in
the instrument to customize your instrument for your installation. The first two steps are quite obvious. The
entries made to the instrument for your installation tells the instrument such things as how many pulses per
revolution of your engine, units (Fahrenheit or Celsius), etc.
Following these steps, operation of the instrument will be verified by applying power to it. Finally, you will set
your engine limits, and customize the display pages to your liking.
During flight you will use the leaning functions to accurately lean your engine. During the cruise
portion of your flight you will use the tracking functions to continuously monitor your engine for even
momentary signs of developing engine problems. Now let’s get started with the installation by turning
to the section “Installation” which begins on page 110
3. Using the Engine Information System
Refer to figure 1 for a description of the various display pages, and to figure 2 for an illustration of the
use of the EIS from panel keys to control the operation of the instrument.