G1000 NXi System Maintenance Manual Page 126
King Air 300 Series Revision 1
190-00716-N1
Engine Data Check
Accomplish this section to verify the engine data availability and validity for ITT and torque.
Remove the left and right engine cowling (Ref. King Air 300 Series Maintenance Manual,
Chapter 71-10-00) to gain access to the engine harness connectors and reinstall cowling when
testing is complete. Required test equipment is provided in Table 4-11. Any product
conforming to the specification listed may be used.
Test Equipment Requirement
Calibrated DC Power Supply 0-100 mVDC, 0-10 VDC
ITT Tester 200C-1200C
Table 4-11, Engine Data Check Test Equipment
ITT
1. Disconnect all thermocouple wires except for the Alumel-Green #10 and Chromel-White
#8 leads from the left hand engine thermocouple junction block mounted to the gas
generator case.
2. Connect the DC Power Supply or ITT Tester (or equivalent) across the Alumel-Green
#10 (-) and Chromel-White #8 (+) leads of the thermocouple junction block. Make sure
the polarity of the Alumel and Chromel leads are strictly observed when making
connections.
3. Apply external power to aircraft and start the G1000 in normal mode.
4. Verify the gauge indications at the test points in Table 4-12 are within specified
tolerances.
NOTE
If the ITT Tester is not temperature compensated or if using the DC Signal
method, use the chart shown in Figure 4-4 to convert the ambient temperature
to millivolts and subtract from the DC Signal value in Table 4-12.
Test Point
(degC)
DC signal
(mV, subtract
temp offset)
Indication
(degC)
200 8.137 200 +/- 17
400 16.395 400 +/- 17
600 24.902 600 +/- 12
800 33.277 800 +/- 7
1000 41.269 1000 +/- 12
1200 48.828 1200 +/- 17
Table 4-12, ITT Indication Test Points
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