ricknroll From Afghanistan, joined Jan 2012, 1064 posts, RR: 0
Reply 1, posted (3 years 1 week 4 days 9 hours ago) and read 3254 times:
According to the article the A320 problem was tracked down to a software issue. Wonder if it was anything like the problem NASA had with the robotic arm on the space shuttle. It worked fine till some unexpected movement was made and then the software bug appeared.
B6JFKH81 From United States of America, joined Mar 2006, 2921 posts, RR: 7
Reply 3, posted (3 years 1 week 4 days ago) and read 2607 times:
Quoting ricknroll (Reply 1): According to the article the A320 problem was tracked down to a software issue.
Hate to tell the writers of this article, but it wasn't just a "software" issue, it was also a hardware issue which was effective for specific serial numbers of the Messier NLG Assembly as an internal component was crapping out. I remember that modification very well (and this has been brought up in multiple threads at this point, including the thread from the TAM incident). Messier said it couldn't be done "in house" (by the airline). With the oversight of the FAA we were able to not only do it "in-house" but in some cases perform the modification of multiple aircraft per night (I believe one night 3 aircraft were completed). To this day, there are upper-ranking crewmembers who have the plaques (which had the removed faulty components mounted on them) from the "NLG MOD" on their desk. The reason only specific serial numbers were effected? Because Messier changed the design of the internal component somewhere along the way, assemblies that already had this new component didn't need the mod done. So the OEM of the NLG even knew there was a flaw with the component
Also, as stated in the TAM thread from last week, Airbus aircraft are not the only ones who have had gear issues.
"If you do not learn from history, you are doomed to repeat it"
strfyr51 From United States of America, joined Apr 2012, 1997 posts, RR: 1
Reply 4, posted (3 years 1 week 3 days 9 hours ago) and read 2263 times:
At United we've had this happen on the ground after a strut seal replacement on the nose gear. Both times it turned out to be the (6GC) steering feedback . since the steering is all electric it has some failures that defy the imagination. .