Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Inertial Reference System (IRS) Issues  
User currently offlineTrogerWilliams From United States of America, joined Feb 2011, 19 posts, RR: 0
Posted (3 years 6 months 2 days 19 hours ago) and read 4404 times:

Does anybody know about any accidents besides Adam Air 574 in 2007 that involved faulty Inertial Reference Systems (IRS)?

Adam Air's records showed 154 recorded defects with IRS in their planes in a 3-month period prior to this accident. Does anyone know of other airlines, or other events, that have neglected that system?

http://en.wikipedia.org/wiki/Adam_Air_Flight_574#Investigation

http://aviation-safety.net/database/record.php?id=20070101-0

5 replies: All unread, jump to last
 
User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 1, posted (3 years 6 months 2 days 14 hours ago) and read 4303 times:

Quoting TrogerWilliams (Thread starter):
Does anybody know about any accidents besides Adam Air 574 in 2007 that involved faulty Inertial Reference Systems (IRS)?

The IRS was "involved" only in the sense that it happened to be the system that the pilots got distracted troubleshooting. It could have just as easily been a faulty pressurization controller, or a flaky FMC, etc. The fact that it was the IRS, rather than another system, didn't have anything to do with the accident.

Tom.


User currently offlinebio15 From Colombia, joined Mar 2001, 1089 posts, RR: 7
Reply 2, posted (3 years 6 months 1 day 23 hours ago) and read 4151 times:

What was the IRS fault?

User currently offlineTrogerWilliams From United States of America, joined Feb 2011, 19 posts, RR: 0
Reply 3, posted (3 years 6 months 1 day 20 hours ago) and read 4121 times:

Quoting tdscanuck (Reply 1):
The fact that it was the IRS, rather than another system, didn't have anything to do with the accident.

In this case the airline had, according to reports, neglected the IRS on many of its planes. Faults and malfunctions were reported often (almost daily, before and after the big accident) and the ground crew's response was to simply clean off the nodes or swap it with another plane's IRS.

You're right, the pilot distraction was a big part of it, but the malfunction could have been preventable, as I understand it, if the unit had been replaced long before.

I can rephrase my question:

Can anyone provide any examples of accidents caused by instruments or components that had been knowingly neglected by maintenance?


User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 4, posted (3 years 6 months 1 day 14 hours ago) and read 4062 times:

Quoting bio15 (Reply 2):
What was the IRS fault?

The left and right IRS were providing different position and wind solutions. The crew got so distracted trying to troubleshoot the IRS discrepancy that they lost control of the airplane.

Quoting TrogerWilliams (Reply 3):
You're right, the pilot distraction was a big part of it, but the malfunction could have been preventable, as I understand it, if the unit had been replaced long before.

That's probably true, but a crew that can get that distracted by something so trivial has completely lost touch with "Aviate, navigate, communicate" and would be much more likely to have suffered the same fate at some point in the future as the result of some other component malfunction. We're never going to get to the state of airliners that never have malfuctions, so the crucial thing here is to not crash a perfectly airworthy aircraft.

Tom.


User currently offlinemandala499 From Indonesia, joined Aug 2001, 6842 posts, RR: 75
Reply 5, posted (3 years 6 months 1 day 13 hours ago) and read 4053 times:

I'll keep this short...
I am quite reluctant to discuss much further at the moment because I fear that the information (such as those I've provided in the past for other incidents/accidents) have led to it being used for court cases beyond what I deem as reasonable limits (mainly at attempts of apportioning product liability regardless of "foreseeability" and "reasonable expectations").

Have you read the accident investigation report? If I remember correctly, the report underlined the fact that whilst the IRS fault did occur, poor CRM and poor crew training led to the primary cause of the accident, that is, the crew losing situational awareness.

To churn it easier, watch Air Crash Investigations "The plane that vanished", it's available on youtube.

Quoting TrogerWilliams (Thread starter):
Does anybody know about any accidents besides Adam Air 574 in 2007 that involved faulty Inertial Reference Systems (IRS)?

Incidents, yes. The "land hundreds of miles from one's destination because the IRS went bonkers" incident (mentioned in the ACI episode).
For suspected, there's also the Batavia Ketapang incident, where a Batavia Air 737 ended up trying to approach an airport 150NM from its destination before realizing they weren't where they were supposed to be.

In those 2 cases, they didn't loose the basic airmanship values of "aviate, navigate, communicate"... (well, communicate is debateable!  &nbsp 

Our regulators were caught with it's pants down when the director of air transport led the press conference ranting "the aircraft has a clean bill of health", which no one believed... he has since been replaced. And we got the EU ban and FAA country category II slapped on us because of the guy, till this day! At least it drove the DGCA to reform and begin to sideline the "usual suspects within".

Whist we still got some way to go, progress has been good but not perfect. C'est la vie, we just continue on advocating change for the better. The crooks can answer in the afterlife! The last thing I want is to chase those guys and end up causing more damage to the country's air safety record (whatever is left of it) by triggering cover ups...

Mandala499



When losing situational awareness, pray Cumulus Granitus isn't nearby !
Top Of Page
Forum Index

Reply To This Topic Inertial Reference System (IRS) Issues
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
Inertial Reference System (IRS) Issues posted Tue Feb 22 2011 16:37:05 by TrogerWilliams
A380 Hydraulic System posted Thu Nov 4 2010 22:34:01 by PolymerPlane
Flight Instructor Reference Guides posted Sun Oct 3 2010 19:56:23 by martinairyyz
Future 787 Wing Flex Issues posted Sat Aug 7 2010 10:00:48 by mortkork
777 Or 787 Epas - Emergency Power Assist System posted Tue Aug 3 2010 14:59:04 by slimshady
A32X Strobe Light System posted Sun Jun 13 2010 08:49:24 by as739x
Easyjet Using System To See Volcanic Ash, Perhaps posted Fri Jun 4 2010 02:06:06 by OLy720man
Future Air Nav System ( Fans ) : When And How? posted Thu May 20 2010 15:12:08 by Gonzalo
Safety Issues After Volcano posted Tue Apr 20 2010 18:48:22 by ANITIX87
Simple Taxiway-Takeoff Prevention System posted Sat Feb 27 2010 05:04:00 by faro
Collins AINS-70 Navigation System posted Wed Dec 4 2013 13:16:14 by NIZMO
How Does A Software Change Solve Icing Issues? posted Sun Nov 24 2013 18:54:25 by BreninTW
Weight/balance Issues On Regional Craft? posted Thu Sep 26 2013 11:26:58 by washingtonflyer
787 Interior Lighting System posted Tue Sep 17 2013 11:37:41 by DocLightning
Basic Parameters Of An Aircrafts Electrical System posted Tue Apr 30 2013 09:04:22 by novice
The Passenger Oxygen System posted Tue Apr 2 2013 22:38:22 by novice
How Do You Engage An Autothrottle System? posted Fri Mar 8 2013 13:50:05 by Novice

Sponsor Message:
Printer friendly format