System Maintenance Manual

Page 6-12 G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air
Revision G 190-00682-01
Replacement:
1. Crimp pins, item 2, onto each of the thermocouple wires, item 1. Ensure that pre-stripped wire
length is 1/8” prior to crimping.
2. Insert newly crimped pins and wires into the appropriate connector housing location, item 4, as
specified by King Air C90 Wiring Diagram, listed in Table 1-2.
3. Place thermocouple body, item 1, onto the backshell boss, item 5. Place the thermocouple as
shown in Figure 6-2 so that the wires exit towards the bottom of the backshell.
4. Fasten thermocouple tightly to backshell using the provided screw, item 3.
5. Fasten cover, item 6, to backshell using the provided screws, item 7.
6. Continue to Section 7.4.1 and verify that the ITT indications are valid on the MFD.
6.18 GPS/WAAS Antennas
Remove and install the GPS/WAAS antennas in accordance with the antenna installation drawing (refer
to Master Drawing List, listed in Table 1-2, for specific drawing number). For procedural instructions on
accessing the GPS antennas, refer to the King Air Model 90 Series Maintenance Manual, listed in Table
1-2.
Proceed to Section 7.3.1 GPS Signal Acquisition for testing.
6.19 Engine Signal Conditioners
Removal:
1. For the Signal Conditioner No. 1, remove PFD1 from the instrument panel as per Section 6.1. For the
Signal Conditioner No. 2, remove PFD2 from the instrument panel as per Section 6.1.
2. Remove three top screws from signal conditioner rack.
3. Slide mounting tray out from rack and disconnect the unit connector. If needed, remove MFD as per
Section 6.1 to access the signal conditioner connector.
4. Remove the four mounting bolts and remove the signal conditioner unit.
5. If planning to reinstall the same unit, it is not necessary to disconnect the ground strap from the unit
ground stud. If replacing with a new unit, disconnect the ground strap from the removed unit and
retain the ground strap and associated hardware for reinstallation on the new unit.
NOTE
The signal conditioner ground strap was added by STC SA01456WI-D Master Drawing List, 005-00375-
30, Revision 5 and subsequent approved revisions for aircraft with Vibro-Meter Signal Conditioner. The
ground strap is not applicable to installations with the Sandia ST26 tach-gen adapter unit.
Reinstallation:
1. Reinstallation of the signal conditioner unit is the reverse of the removal. Reference the Main
Instrument Panel Installation drawing, listed in Table 1-2, for more details.
2. Proceed to Section 7.4.1 for testing.