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G1000 System Maintenance Manual – Diamond DA40/40F Page 6-11
190-00545-01 Revision G
6.13 GEA 71 Backshell Thermocouple Removal & Replacement
The GEA 71 has a K-Type thermocouple (Item 1 shown below) installed in its backshell, in addition to
the configuration module. The thermocouple is used in conjunction with the configuration module
temperature sensor to compensate for EGT/CHT temperature probe errors resulting from the dissimilar
metals at the pin contacts.
Figure 6-4. GEA Backshell Thermocouple
Table 6-3. Thermocouple Kit (011-00981-00)
Item # Description Qty. Needed Garmin Part Number
1 3” Thermocouple, K type 1 925-L0000-00
2 Pins #22 AWG 2 336-00021-00
3 Screw 1 211-60234-08
Removal
1. Remove GEA 71 per Section 6.4.
2. Remove GEA connector backplate.
3. Remove connector J701, item 5, from the backplate.
4. Remove cover, item 6 from the backshell.
5. Unscrew thermocouple from boss on backshell. Extract the thermocouple pins from the
connector.
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 the Diamond wiring diagram.
3. Place thermocouple body, item 1, onto the backshell boss, item 5. Place the thermocouple as
shown in Figure 6-4 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 7.4.2 and verify that the EGT and CHT indications are valid on the MFD.
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