System Maintenance Manual

G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 7-17
190-00682-01 Revision F
7.4.2.4 Oil Temperature Functional Test
Required test equipment:
Test Equipment Make/Requirement Model/Part Nbr
Decade Box 0-1k ohms As appropriate
1. Using a decade box or equivalent, simulate resistance values into No. 1 GEA via left engine
firewall connectors-pins J104-W (HI) and J104-X (LO).
2. Simulate the following resistances, and verify the indication and status:
Test Point (ohms) Indication (DegC) Status Configurations
129 +/- 10 100
red digital*
NOTE: red radial 99
all
(*) steady after 5 seconds
3. Repeat steps 18 and 19 using the No. 2 GEA via right engine firewall connectors-pins J105-W (HI)
and J105-X (LO).
4. If no other tests will be completed in this section, do the following:
a. Disconnect test equipment.
b. Ensure firewall connectors are reconnected.
Verify all engine parameters are displayed valid on the MFD with no Red X’s.
7.4.2.5 Turbine Tach (N1) Functional Test
Required test equipment:
Test Equipment Make/Requirement Model/Part Nbr
Signal Generator 0-10Vdc / 0 – 1k Hz As appropriate
1. Using a signal generator, inject a 3 Vrms signal into the No. 1 TACH-GEN Adapter via left engine
firewall connectors-pins J104-J and J104-K.
2. Simulate the following frequencies, and verify the indication and status:
Test Point (Hz) Indication (%) Status Configurations
40.6 +/- .35 58
bottom of green band
green digital
all
71.4 +/- .35 102
red digital*
NOTE: red radial 101.5
all
(*) steady after 5 seconds
3. Repeat steps 1 and 2 using the No. 2 TACH-GEN Adapter via right engine firewall connectors-pins
J105-J and J105-K.
4. If no other tests will be completed in this section, do the following:
a. Disconnect test equipment.
b. Ensure firewall connectors are reconnected.
c. Verify all engine parameters are displayed valid on the MFD with no Red X’s.