Mooney M20M, Pilot Operating Handbook

Page: 305 / 377

GI 275 Part 23 AML STC
190-02446-12 Rev. 4
Airplane Flight Manual Supplement Page 65 of 70
Engine Indication System
Engine gages are optionally provided for single and twin engine aircraft with
four and six-cylinder reciprocating engines.
The following indications are provided in all EIS installations:

Tachometer

Manifold Pressure (If required)

Oil Pressure

Oil Temperature
Other engine gauges may be provided by either the EIS display or previously
installed indicators in their original locations. The following gauges may be
provided on the GI 275 EIS display:

Fuel Flow

Cylinder Head Temperature (CHT)

Exhaust Gas Temperature (EGT)

Fuel Pressure

Electrical gauges (Amps / Volts)

Main and Auxiliary Fuel Quantity

Carburetor Air Temperature (CAT)

Turbine Inlet Temperature (TIT)

Inlet Air Temperature (IAT)

Compressor Discharge Temperature (CDT)

IAT/CDT Differential
Additional functions provided by the EIS system include a fuel computer, hour
meters, and pilot-selectable engine advisories.
The layout of EIS gauges is dependent on the GI 275 display type and number
of engines. The determination of which data is presented in which slot is set by
the installer in configuration mode based on data in the STC which specifies the
data located in each position. The markings on the EIS gauges are the same as
those markings provided by the previously installed gauges and depict the
operating ranges and limitations provided in the Airplane Flight Manual and
Type Certificate Datasheet.
Some previously installed aircraft gauges included non-required markings such
as advisory marks for certain altitude and power combinations. EIS gauges will
include all markings required to comply with operating limitations associated
with that gauge. Markings not required by regulation and which do not convey
limitations or operating ranges are provided to the pilot by means of a placard.
EIS gauges include display characteristics to attract the pilot’s attention when
outside normal operating ranges. Gauge alerting behavior in caution or warning
ranges is suppressed when the engine is OFF and the aircraft is on the ground.