G550 G500 G450 AD [Archive]

clearedfirstexit

2nd Mar 2006, 22:08

THe FAA have posted an AD for the GIV-X (G450) and GV-SP aka G550 -following all screen failure recently.

Must have been exciting to be flying with all screens down! Anyone have any details of what happened.

g4phil

3rd Mar 2006, 06:22

Cert Charlie BUGS

Problems with the AGM

Bumz_Rush

3rd Mar 2006, 12:42

This problem was addressed last year.

Is this an update on the old problem, or what....????

Bumz

refplus20

3rd Mar 2006, 18:34

:sad:

Read it here ...

http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/DEDC1099874ABAF18625711F006CECC8?OpenDocument

clearedfirstexit

4th Mar 2006, 06:17

It appears that this AD follows 4 rewrites of the software to drive the Honeywell system but so far no permanent fix has been found. This drove the need for this years AD.

refplus20

4th Mar 2006, 10:19

:uhoh:
The end of the MOL procedures read:

If DUs DO NOT recover:
6. Continue flight using VGS and/or Standby Instruments.
7. Notify ATC of situation.
8. Proceed to the nearest suitable airport and land.

:oh: :oh: :oh:

g4phil

4th Mar 2006, 16:50

A Gulfstream G550 operator recently reported that all four DUs intermittently displayed a red X during flight. The DUs would intermittently go blank and / or indicate a red X with numerous Crew Alerting System (CAS) messages displayed. Throughout this event the standby instruments were used to maintain control of the aircraft, with the primary instruments used as back-up when the displays were available.
The flight crew contacted their maintenance department which in turn contacted Gulfstream Technical Operations for assistance. The display system was stabilized and the aircraft continued on to its scheduled destination. It should be noted this aircraft is equipped with Aircraft Service Change (ASC) 904 (Certification “C”).
Investigation into this event revealed the number 2 Advanced Graphics Module (AGM) went into a continuous reset condition. Evaluation of the Central Maintenance Computer (CMC) fault history revealed numerous AGM resets, which resulted in the intermittent red X condition. Honeywell has determined that this condition is caused by the AGM Reversion modification that was introduced in ASC 904.