R
EVISION
:
-
D
ATE
:
12/29/04
P
AGE
:
4
Copyright
2004 Glasair Aviation, LLC Arlington, Washington All rights reserved
studying a copy of AC 90-89 before engaging in any test operations. It
is available from:
Superintendent of Documents
U.S. Government Printing Office
Washington, DC 20402
8-2 GROUND TESTS
Before beginning taxi testing, run the engine without the engine
cowling in place so that oil leaks, fuel leaks or vibration problems can
be seen and remedied immediately. Run the engine at various power
settings from idle to maximum static r.p.m.
CAUTION
Make sure the airplane is adequately secured and the area
around the propeller is clear of stones and other foreign
objects. Have someone stand by with a fire extinguisher
during initial engine runs.
Run the engine for short periods of time and monitor temperature
gauges to avoid overheating the engine. Have helpers observe the
engine and related systems from outside while you control the engine
and monitor the instruments from inside the cockpit.
During the initial engine runs, make sure that all the engine instruments
and controls work properly. Check the oil pressure, the alternator
output, left and right magneto drops and the r.p.m. drop with
carburetor heat. Switch the magnetos off momentarily to check the