Instruction Manual
G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air Page 4-27
190-00915-01 Revision 8
4.11 Engine Data Check
Accomplish this section to verify the engine data availability and validity for oil pressure, ITT and torque.
Remove the left and right engine cowling (Ref. King Air 200 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 4-12. Any product conforming to the specification listed
may be used.
Test Equipment Requirement
Signal Generator 0-10Vdc / 0 – 1k Hz
Thermocouple Calibrator K-type, 200 to 1,200°C
Table 4-12, Engine Data Check Test Equipment
4.11.1 Oil Pressure
1. Remove power from aircraft.
2. Disconnect the left engine oil pressure transmitter connector P12.
3. Connect the Signal Generator to pins A (-) and B (+) of P12 connector.
4. Apply external power to aircraft and start the G1000 in normal mode.
5. Using a Signal Generator, inject DC signals specified in Table 4-13 and verify the indications
are within specified tolerances:
Test Point (Vdc) Indication (PSI)
0.0 +/- .10 0 +/- 4
1.25 +/- .10 50 +/- 4
2.50 +/- .10 100 +/- 4
3.75 +/- .10 150 +/- 4
5.00 +/- .10 200 +/- 4
Table 4-13, Oil Pressure Indication Test Points
6. On the right hand circuit breaker panel, open the GIA1 (PRI) and GIA1 (SEC) circuit
breakers, and verify the last observed oil pressure indication remains unchanged. Reset the
GIA1 (PRI) and GIA1 (SEC) circuit breakers.
7. Repeat steps 1 through 5 using pins A (-) and B (+) of right engine P12 connector.
8. Pull the GIA 2 circuit breaker, and verify the last observed oil pressure indication remains
unchanged. Reset the GIA 2 circuit breaker.
9. Remove power from aircraft and reconnect left and right engine oil pressure transmitter
connectors.
4.11.2 ITT
1. Remove power from aircraft.
2. 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. (Ref. King Air 200 Series Maintenance Manual, Chapter 77-00-00)
3. Connect the Thermocouple Calibrator (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.