For Your Safe Flight Page | 62
GPS Interface Diagnostics
Measurements ‘xxx REQ’,
‘xxx RES’ and ‘xxx MPG’ are
all missing from the scan.
No communications from GPS
receiver to EDM. Possibly no
connection or aircraft GPS is off.
NO - COM message and
‘xxx REQ’, ‘xxx RES’ and
‘xxx MPG’ are all missing from
the scan.
Communications are received by
EDM and the Auto-Protocol setup is
in process. Verify correct output
format setup in GPS receiver; check
GPS connections.
NO - SIG message and
‘xxx REQ’, ‘xxx RES’ and
‘xxx MPG’ are all missing from
the scan.
GPS receiver has insufficient signal
for valid data.
NO - WPT message and
‘xxx REQ’, ‘xxx RES’ are all
missing from the scan.
No waypoints are programmed into
the aircraft GPS receiver.
Message ‘- - - REQ’ or ‘- - -
RES’ appears.
Your ground track is too many
degrees (typically more than 70°)
off from your course to the next GPS
waypoint.
Section 12 - Appendices
Shock Cooling
Cooling the cylinders too fast can result in cracking and eventual failure.
Lycoming Service Instruction 1094D (March 25, 1994) on Fuel Mixture
Leaning Procedures states:
“At all times, caution must be taken not to shock cool the
cylinders. The maximum recommended temperature change
should not exceed 50°F per minute.”
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