Garmin G5 User Manual page 52

Installation Manual
5) Select Done when the test has been completed. Passing results will be
indicated by a green check mark and failures will be indicated by a red "X".
If failures are indicated, repeat the test. If failures persist, the installation
should be considered unreliable until the source of the vibration problem
is identified and remedied. Record the out of range limit values for future
reference.
The following are potential causes for failures of the engine run-up test:
a) Excessive flexing of the G5 mechanical mounting with respect to
airframe (see Section 1.3.4.1 for applicable mounting requirements and
instructions).
b) Vibration or motion of the G5 caused by neighboring equipment and/or
supports.
c) Mounting of the G5 in a location that is subject to severe vibrations
(e.g. close to an engine mount).
d) Mounting screws and other hardware for G5 not firmly attached.
e) Absence of recommended mounting supports.
f) G5 connector not firmly attached to unit.
g) Cabling leading to the G5 not firmly secured to a supporting structure.
h) An engine/propeller combination that is significantly out of balance.
NOTE: In some aircraft, attempting the engine run-up test on a day with very
strong and/or gusty winds may cause the test to occasionally fail. However, windy
conditions should not be taken as evidence that the test would pass in calm
conditions; an actual pass is required before the installation can be considered
adequate.
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Garmin G5 User's Manual 190-02072-00 Rev. B