System Maintenance Manual

Page 4-32 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision F 190-00682-01
Test Point (mV) Indication (degC) Status Configurations
16.40 +/- .28 400*
bottom of green band
green digital
all
44.3 +/- .28 1090*
red triangle, start mode
red digital**
all
(*) verify value displayed is within test point tolerances
(**) steady after 5 seconds
10. On the right hand circuit breaker panel, open the GIA1 (PRI) and GIA1 (SEC) circuit
breakers, and verify the last observed ITT indication remains unchanged.
11. Close the GIA1 (PRI) and GIA1 (SEC) circuit breakers, and wait until the COM1 and
NAV1 fields are valid.
12. Repeat steps 8 and 9 using the No. 2 GEA via right engine firewall connectors-pins
specified below and right engine ITT thermocouple.
S/N LJ-1063 thru LJ-1360, LJ-1362: J105-T* (LO) and J105-W* (HI)
S/N LJ-1361, LJ-1363 and after: J105-P* (LO) and J105-S* (HI)
13. Pull the GIA 2 circuit breaker, and verify the last observed ITT indication remains
unchanged.
14. Close the GIA 2 circuit breaker, and wait until the COM2 and NAV2 field are valid.
Oil Pressure
15. 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).
16. 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
2.1 +/- .1 85 +/- 1
bottom of green band
Green digital
1-3, 11-20
17. 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.
18. Close the GIA1 (PRI) and GIA1 (SEC) circuit breakers, and wait until the COM1 and
NAV1 fields are valid.
19. Repeat steps 15 and 16 using the No. 2 GEA via right engine firewall connectors-pins J105-
A (LO) and J105-B (HI).
20. Pull the GIA 2 circuit breaker, and verify the last observed oil pressure indication remains
unchanged.
21. Close the GIA 2 circuit breaker, and wait until the COM2 and NAV2 field are valid.
22. Disconnect test equipment.
23. Reconnect the following firewall connectors, and verify all engine parameters are displayed
valid on the MFD with no Red X’s: J102, J103, J104, J105