System Maintenance Manual

Page 7-16 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision G 190-00682-01
7.4.2.3 Oil Pressure 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 DC signal into the No. 1 GEA via left engine firewall connectors-
pins J104-A (LO) and J104-B (HI).
2. Simulate the following voltages, and verify the indication and status:
Test Point (Vdc) Indication (PSI) Status Configurations
.98 +/- .1 39 +/- 1
red digital
NOTE: low red radial 40
all
2.0 +/- .1 80 +/- 1
bottom of green band
Green digital
4-10, 21-22
2.1 +/- .1 85 +/- 1
bottom of green band
Green digital
1-3, 11-20
3. 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.
4. Close the GIA1 (PRI) and GIA1 (SEC) circuit breakers, and wait until the COM1 and NAV1 fields
are valid.
5. Repeat steps 1 and 2 using the No. 2 GEA via right engine firewall connectors-pins J105-A (LO)
and J105-B (HI).
6. Pull the GIA 2 circuit breaker, and verify the last observed oil pressure indication remains
unchanged.
7. Close the GIA 2 circuit breaker, and wait until the COM2 and NAV2 field are valid.
8. 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.