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Search: Posts Made By: tdracer
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Forum: Rumours & News
29th Oct 2015, 23:19
Replies: 71
Views: 56,288
Posted By tdracer

Lomapaseo, in defense of safetypee, there are...

Lomapaseo, in defense of safetypee, there are really two discussions going on that have become intertwined. The first, which was the original subject of this thread, was a shutdown and air turnback....
Forum: Rumours & News
29th Oct 2015, 17:52
Replies: 71
Views: 56,288
Posted By tdracer

safetypee, it's not ice crystal icing (no...

safetypee, it's not ice crystal icing (no meaningful ICI events with the latest altitude restrictions and software). The rollbacks are related to a sensor, but I'd rather not elaborate at this time....
Forum: Rumours & News
29th Oct 2015, 14:30
Replies: 71
Views: 56,288
Posted By tdracer

Three pages back, I wrote this: As...

Three pages back, I wrote this:


As you've noted, they'll likely change the s/w to be more tolerant of the hardware issue that's causing the rollback, but once again, the rollbacks were not...
Forum: Rumours & News
26th Oct 2015, 02:42
Replies: 71
Views: 56,288
Posted By tdracer

I deal with "Design Assurance Level A" or DAL A...

I deal with "Design Assurance Level A" or DAL A software regularly. Nearly all the "software errors" we see are not really software errors - they are requirements errors. The software is doing...
Forum: Rumours & News
24th Oct 2015, 03:25
Replies: 71
Views: 56,288
Posted By tdracer

UDT - as is sometimes the case, I know more than...

UDT - as is sometimes the case, I know more than I can probably repeat. But we have a pretty good idea what's causing the rollbacks (all recoverable, BTW), and it's not software as such (although...
Forum: Rumours & News
23rd Oct 2015, 22:59
Replies: 71
Views: 56,288
Posted By tdracer

The shutdown rate for the GEnx engines (both -1B...

The shutdown rate for the GEnx engines (both -1B and -2B) is running around 2 per million engine operating hours. That's only about ten times better than what's required for 180 minute ETOPS.:=

...
Showing results 1 to 6 of 6


 
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