For Your Safe Flight Page 29
ignition will destroy your engine in less than a minute unless you
take immediate corrective action.
Section 5 - Data Logging
On monthly intervals, you may choose to jot down peak EGT, parameter
sequence values, and cruise engine settings on a data logging worksheet
in the back of this book. Look for trends as well as absolute values. DIF
is a good indicator of the overall health of the engine. Typical values are
less than 80 F° for a factory new fuel injected engine, and less than
150 F° for a carbureted engine. If you discover a DIF spread greater than
this, identify the effected cylinder and initiate preventive maintenance.
Trend data for EGT and CHT is also of value. Any departure from a
cylinder’s baseline requires investigation. Refer to the “Engine Diagnosis
Chart” on page 23. Data logging as a means of identifying trends is of
considerable value in preventative engine maintenance.
EDM Data Logging Worksheet
This is an example of an entry into the worksheet. A blank worksheet is
provided in the back of this guide for you to use.
EGT / CHT RPM
Date Tach Alt #1 #2 #3 #4 #5 #6 TIT DIF MP
2/23/96 453 95 1350
378
1360
382
1390
365
1370
385
1380
369
1370
385
1450 40 2350
28
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