Avionics Systems Abnormals
Gulfstream G450 Abnormals
Theoretically, any AGM failure pulls AGM #3 and creates a red "X" on DU #3. I've had this happen where the autoreversion didn't happen. As it turns out, the reversion mode is within the AGM itself, so if the AGM fails completely it may not revert. If this happens to you, you cannot MEL the AGM, but you can swap them, as we did here.
If you have to fly with a red "X" on the tube, simply turn the brightness to full dim. The screen will go blank, except at night when you can see a dim red "X" if you look hard enough.
Most of the problems we have with the G450 FMS are pilot programming errors. Most, but not all. If you stumble upon a computer programmer error with your FMS, downloading the FMS debug file might give those programmers the information they need. Try to record everything you have pertinent to what you and the FMS were doing prior to the problem, how the problem manifested itself, and how you were (or were not) able to resolve the issue. Once you get on the ground, download the debug file as follows.
On the MCDU, press the NAV key to bring up NAV INDEX 1/2. Press the NEXT key to bring up NAV INDEX 2/2.
Select MAINTENANCE (LSK 2R) to access the FMS MAINTENANCE 1/3 page.
Press the NEXT key to access the FMS MAINTENANCE 2/3 page.
Select SETUP (LSK 6L) to access the FMS SETUP 1/1 page.
Select ENGR DATA (LSK 2R) to access the ENGINEERING DATA 1/1 page.
Select DEBUG (LSK 1L) to access the DEBUG MONITOR CNTRL 1/1 page.
Before selecting CTL D (LSK 4L) ensure PCMCIA 2, not PCMCIA 1 is selected as the storage device by selected OR (LSK 5R).
Select CTL D (LSK 4L) to start the Control-D file capture process.
Repeat this process for all three MCDUs.
This will send FMS Debug Data to the PCMCIA card in the DMU. Retrieve the data by inserting the PCMCIA card to a compatible computer.
Fair Use Statement
This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in an effort to further education and advance flight safety. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have an interest in furthering flight safety.
My objective is to give pilots the tools they need to fly more safely. If you are a copyright holder and see your material here, that means I think your work can help to that end. Still, if you would rather your materials not appear on this website, please "Contact Eddie" using the link below and your material will be removed. It will be our loss, but I understand the need to protect creative rights.
To answer another frequent question: yes I live in fear of law suits and have reached out for permissions where possible. Gulfstream has been very good about all of this provided I add the note shown below. Let me be clear about this: I think the world of Gulfstream Aerospace. There is no prettier wing in existence than what you see on a GV or G550 and the best cockpit I've ever touched is in my trusty G450.