What to do if EGI is damaged

In a mission, I think I had my EGI damaged because NAV warning light was on and I lost my TAD as well as other information on the HUD.

In this case, I switched to HARS.

Several questions:

1. Can I still have the HSI point to my waypoint? I don't know if I can select waypoints via the CDU.

2. If I want to divert, I could punch in my home airfield TACAN into TACAN and use the HSI bearing pointer.

3. Can I still operate GPS-JDAMS? The CCRP reticle won't show up.

4. Can I still operate laser guided bombs or anything else?

Thanks,

From my emergency checklist (thanks 25th VFS) :

NAV. There are multiple reasons this light may illuminate and most of them involve EGI state. Possible reasons for this caution and corrective actions include:

EGI flight instrument failure

1. Set the Navigation Mode Select Panel to HARS from EGI

2. Verify an EGI FLY INST FAIL message on the CDU

3. From the RESET page of the CDU, select the EGI line select key

EGI is not ready failure

1. Verify EGI switch is set to ON on the AAP

2. Set the EGI switch to OFF for at least 10 seconds

3. Reset the EGI switch back to ON

EGI GPS failure

1. On the CDU, verify a GPS FAIL message

2. On the Navigation Mode Select Panel, ensure EGI is selected

3. From the CDU RESET page, press the REINT INS line select key, if failure persists…

4. On the Navigation Mode Select Panel, select HARS

5. On the CDU REINT page, press the REINT GPS line select key

EGI INS failure

1. On the CDU, verify an INS FAIL message

2. On the Navigation Mode Select Panel, ensure EGI is selected

3. From the CDU RESET page, press the EGI line select key, if failure persists…

4. On the Navigation Mode Select Panel, select HARS

5. On the CDU REINT page, press the REINT GPS line select key

Hope that helps.

http://en.wiki.eagle.ru/w/images/2/2e/25th_VFS_Checklists_Emergency_Procedures.pdf

1. I believe HARS doesn't store waypoints, it just gives you position. But I'm not sure, when I lose the EGI I usually RTB using TACAN, because it is really rare to be hit and only lose EGI.

2. Correct

3. No, you can't. They need to be feed from the CDU GPS system

4. Sure you can, just drop them in CCIP mode, either direct or indirect.