Milestone PLANK Owner First F-35C Arrest NIMITZ 03 Nov 2014

[neptune]

... Martin mistook a laptop-like portable maintenance device used on the flight line for something spooky like an R2D2 (conjures an instant image doesn't it?) and no one corrected the thought. ...

Sorry, we were to busy laughing!

...not an apologist for ALIS we do expect it to be the system that "Prevents" the fire at Eglin. Infant mortality and teething pains aside, ALIS is the system that leads to the future end of A-799 gripes. Anyone that has been in military aviation maintenance and management well understands the necessity of these system integrations and supervisory analysis, ALIS must work!

[XanderCrews]

ALIS still a problem area...


The F-35 Has To Phone Texas Before Taking Off
Patrick Tucker – Defense One January 8, 2015
http://www.imra.org.il/story.php3?id=66007


"The U.S. military ran the F-35 Joint Strike Fighter through a series of
tests aboard the USS Nimitz super carrier in San Diego in early November. It
performed adequately, with one exception — it needed to send its diagnostic
data to Lockheed Martin in Fort Worth, Texas, before taking off. If the most
recent exercises are any indication, the F-35 may need to phone home every
time it sets out on a mission.

First, the good news. The plane flew through its aerial paces well enough
and passed a majority of its flight tests.

“The test team accomplished 100 percent of the threshold test points and 88
percent of the objective points during deployment, completing 33 test
flights (39.2 flight hours) and 124 arrested landings, of 124 attempts,
including one night flight with two catapult launches and two arrested
landings. The results of the test were still in analysis at this time,”
Pentagon spokesperson Air Force Maj. Eric Badger told Defense One...."

"The possible bad news to emerge from the recent tests is this: The Nimitz
didn’t have the plane’s Autonomic Logistics Information Systems, ALIS, on
board and so the team had to implement a “workaround.” ALIS is the F-35’s
notoriously buggy diagnostic system that can ground fully functional
aircraft. ...."

"ALIS has a rather strained relationship with Air Force Lt. Gen. Christopher
Bogdan, the man in charge of the F-35 Program, as Military.com’s Brendan
McGarry reported in February, Bogdan has few kind words for the system.

“ALIS doesn’t always work right and it is not the font of all knowledge
about the airplane because I got maintainers out there who fix the airplane,
I’ve got pilots who go out and pre-fly the airplane, and everyone in the
enterprise thinks the airplane is ready to go except ALIS,” Bogdan told a
defense budget conference. In terms of manual overrides, Bogden said “we
need to start doing that… We can’t do that wholesale, but we need to do that
in a measured way.”

The Nimitz testing team’s “workaround” streamed the plane’s diagnostic data
to technicians at Lockheed Martin in Fort Worth, Texas. That, in turn,
allowed them “to process the necessary maintenance actions” so the tests
could proceed. ...."

"The Pentagon has not yet said whether the issue that kept all the ALIS
equipment off the Nimitz was related to the difficulty of integrating a
shipping container worth of servers into the ship’s structure, the software
(up to 29 million lines of code and counting for the F-35) or something
else. ..."

clearly an unsolvable problem

[KamenRiderBlade]

XanderCrews

Your forgot your <sarcasm></sarcasm> tags, you know most people can't decipher sarcasm via text on the internet

=D

[popcorn]

...not an apologist for ALIS we do expect it to be the system that "Prevents" the fire at Eglin

Do you know for a fact that ALIS' prognostic monitoring is designed to monitor engine rubbing?

[spazsinbad]

P'raps in future there may be better engine monitoring according to this: [ as we say in Oz "It's the VIBE!" ] viewtopic.php?f=22&t=25667&p=283661&hilit=Wayback#p283661

"Vibration-based prognostics and health monitoring (VPHM) technologies enable early identification and isolation of faults in a critical rotating component in the engine and provide a capability for consistently tracking fault progressions...."

[spazsinbad]

Frum: http://www.f-16.net/f-16_forum_download-id-13103.html F-35 PHM [Prognostics & Health Management] Architecture Unprecedented Aircraft Usage Data Capture

F-35 L/ESS – Usage Data Recording
• Over 150 Parameter Time Histories Captured
– Strain Gauge Data
– Accelerations (Rotational & Translational)
– Velocities & Rates (Rotational & Translational)
– Air Data System Parameters (AOA, Mach No., Altitude, etc)
– Control Surface Deflections
– Stores Configurations & Masses
– Fuel Tank States
– Engine Parameters
– Miscellaneous Discrete Parameters (Weight-on-Wheels, Door Positions, etc)

[spazsinbad]

And... Earlier....: viewtopic.php?f=55&t=16443&p=208781&hilit=footprints#p208781

Core Avionics Master Plan 2012 Appendix A-3 - Navigation 3
07 Sep 2012 frum more PMAs than youse can stick a poke at

...Structural Prognostics and Health Management.
(2015) Joint Strike Fighter (JSF) will field Structural Prognostics and Health Management (PHM) capability in support of mission sortie generation/readiness objectives. Wirelessly downloaded parameters will include fuel state, ammunition state, expendables state, and component health conditions requiring maintenance in order to minimize turnaround time. Real time, accurate down-link of specific component conditions supports CBM [Condition Based Maintenance], which will significantly enhance readiness by enabling maintainers to move from time-scheduled removals and inspections to removing items only when required. Removing components only when they have achieved their tolerance limit of safe operations can also return significant cost avoidances by extending the lives of the parts beyond their engineering estimates, thereby reducing the costs of repairs or replacements. CBM may also result in reduced requirements for spares inventories or deployed spare support footprints...."

Source: http://www.navair.navy.mil/pma209/_Docu ... _Final.pdf (3.3Mb)

And frum (this info must be part repeated elsewhere in this forum but anyways here it is again): and away we go.....
viewtopic.php?f=58&t=12237&p=197514&hilit=Prognostics#p197514

ENGINE MONITORING FOR DA FUTURE MASSES: viewtopic.php?f=56&t=16646&p=211646&hilit=Prognostics#p211646

Long Screed via 'TEG' from JANES: viewtopic.php?f=56&t=14070&p=176033&hilit=Prognostics#p176033

F-35 Joint Strike Fighter - Structural Prognostics and Health Management - An Overview
2009 ICAF Conference Rotterdam; Tim Fallon - JSF Program Office; Devinder Mahal - JSF Program Office; Iain Hebden – BAE Systems

Source: http://icaf2009.fyper.com/uploads/File/ ... Fallon.pdf (3.2Mb)

[quicksilver]

... Martin mistook a laptop-like portable maintenance device used on the flight line for something spooky like an R2D2 (conjures an instant image doesn't it?) and no one corrected the thought. ...

Sorry, we were to busy laughing!

...not an apologist for ALIS we do expect it to be the system that "Prevents" the fire at Eglin. Infant mortality and teething pains aside, ALIS is the system that leads to the future end of A-799 gripes. Anyone that has been in military aviation maintenance and management well understands the necessity of these system integrations and supervisory analysis, ALIS must work!

"Prevent the fire" is debatable because to do so would have required a unique condition-based monitoring system (instrumentation) for a rotating metallic structure deep in the engine. Such instrumentation would assume that one believes there is high potential for a specific condition to develop as a consequence of what were routine maneuvers over (aiui) several flights. If one believed in that probability, then one would resolve that potential condition ahead of time, not simply monitor its potential. Am told not even the SDD aircraft (highly, highly instrumented) have that kind of instrumentation.

In short, they cant monitor everything everywhere all the time. And, you dont know what you dont know until you know it.

[XanderCrews]

XanderCrews

Your forgot your <sarcasm></sarcasm> tags, you know most people can't decipher sarcasm via text on the internet

=D

Oh no I'm 100 percent super cereal on this. Just because the F-35 did a little thing like land on an aircraft carrier flawlessly over and over again after critics bashed if for years, doesn't mean any of it counts now because they have to have an ALIS work around. Might as well not have flown to the boat at all, since the test is now only 99.99 percent success. Its not like they have been using ALIS work arounds for years now anyway.

/SARC/

I mean I hate to use the sledge hammer strategy on this but I'm kind of at the point where its "hey wake me up if there is a problem that means fewer aircraft or the program is canceled" all the rest are details that will get sorted anyway and forgotten by the time people have moved on to the next horrible procurement that will never be as good as the previous thing. Maus can belly ache about how the F/A-XX is being ruined by whatever

If you don't believe me take a good look at what the Super Hornet development looked like. Now of course all its issues are long forgotten and its the clear F-35 rival, because it never had problems in test. No sir. Didn't need NASA and 3 years to fix the abrupt wing stall or anything. Didn't have the GAO recommending it get scrapped entirely. nope.

If Canada withdraws, call me. If someone starts curtailing their orders, call me, but things like "ZOMG, had to check with Ft Worth for some stuff" get outta here. I didn't expect Nimitz being the oldest CVN in the fleet to be fully stocked with a fully operational ALIS. There were also LM employess there which kind of hinted that there was going to be contractor involvement. You know, in the FBI they would call that a "clue"

[KamenRiderBlade]

XanderCrews
https://www.youtube.com/watch?v=dXYWLWx0-S0

This might help explain how Maus and the others believe there is some sort of conspiracy out there with the F-35.

It's not directly related to the F-35, but analyzes the Conspiracy Mentality and how they might constantly believe in it.

Of course this relates to how the F-35 is SOOO horrible in the mind of Maus and others like him despite overwhelming evidence that the F-35 is doing fine.

[spazsinbad]

Perhaps no one realises that NIMITZ is on LAST LEGS anyway. Sheesh. She cannot even go the distance to get fixed for 16 months these days. Don't know what I mean? Those DAMN F-35Cs Musta Dun It! Go here:

http://www.military.com/daily-news/2015 ... 338&rank=3

<SARC OFF> I guess she'll be modified during this maintenance period to better receive the Cees?

[neptune]

[quote="quicksilver.."Prevent the fire" is debatable because to do so would have required a unique condition-based monitoring system (instrumentation) for a rotating metallic structure deep in the engine. ..[/quote]

...we all are allowed an opinion, having designed and operated predictive/ incipient detection systems of aviation derived gas turbines, this system requires and probably has less than 6 sensors each smaller than a dime.

[neptune]

Perhaps no one realises that NIMITZ is on LAST LEGS anyway...

....the rowers mutinied again, they're out looking for new slaves......

[quicksilver]

[quote="quicksilver.."Prevent the fire" is debatable because to do so would have required a unique condition-based monitoring system (instrumentation) for a rotating metallic structure deep in the engine. ..

...we all are allowed an opinion, having designed and operated predictive/ incipient detection systems of aviation derived gas turbines, this system requires and probably has less than 6 sensors each smaller than a dime. [/quote]

I assume you understand that the fire was not the problem; the structural failure was...

[maus92]

It's pretty clear that a module of ALIS maintains a comprehensive record of each aircraft's operational and mx history, including g-forces experienced by the airframe on every flight. There is a history of large bore commercial engine casings deflecting under certain loads, and seeing how quickly Pratt and the PO zeroed in on the problem area, I'm pretty sure they a good idea where to look for anomalies. It is unclear if the F135 has temperature / vibration / rotational sensors or strain gauges specifically embedded or directly measuring parameters in the fan stage that had the failure, but it seems they were able to at least extrapolate what was needed to confirm the frictional heating that lead to the fracturing of fan blades. It doesn't appear that the data collected and analyzed by ALIS could have predicted the failure, but perhaps ALIS will be updated with an algorithm that can, and additional sensors added to the F135 as required.