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Deflategate; new executive pods deflating in-flight

Old Nov 20, 2017, 2:16 pm
FlyerTalk Forums Expert How-Tos and Guides
Last edit by: Argonaut1000
Click here to go to a picture of the White Compensation Form and its stub






View Deflated Seat History Here (Database for submitted occurrences)
Enter New Deflated Seat Occurrence Here (Submit one if you have experienced deflated seat and it will show up in the database above)
----
From post #49 in this thread, here's one potential way to (re)inflate an AC seat:
  • Go the home screen "Your Seat". (find this on the seat side panel; not the main video screen)
    • Hold the top left hand corner "Air Canada" (with AC logo) for 3 seconds. Updated (Apr 9 18): may need to hold for as long as 45 seconds for key pad to appear
      • Dial pad shows up - hit 3-2-1.
        • Press "Reset Lumbar Support"
Note that this method has not met 100% success so YMMV.
A better method is for a crew member to use the reset switch under the seat, on the aisle side.

Compensation offers (green/white sheet completed)
40K AE- Apr 18 (50% back of the J class one way redemption)
2018 Jun - $500 coupon
2018 Sep $1,000 eCoupon or 40K AP (P fare TPAC)
2018 Sep $500 eCoupon (P fare TPAC) (no change on protest- update - 6 months later the $150 was increased to $500 - admitted they had made an error)

Compensation offers (no green/white sheet completed)
100K - May 5 (C$150 eCoupon; was moved to a functioning seat after meal service)
2017 Sept - 8,000 AE miles - reported via complaint web page after realizing it was a faulty seat, not standard discomfort; Asked for return of eUps but they declined.
2017 Nov & 2018 Feb - $500 coupons both times (second time on protest that $500 had been offered the previous time)
2018 Sep. $250 coupon (on a paid J TATL).
2018 Nov - $500 eCoupon (J TATL)

Standard eCoupon compensation offers (no haggling; following a recurring pattern)
~10+ hours: $1000
Long TPAC (TPE-YVR)

~6 to ~10 hours: $500
Short TPAC (NRT-YVR)
TATL
South America: YYZ-GRU

less than ~6 hours: 300
TCON


Have a Service Director (SD) That Is Giving You the Case of the Shrugs? Like the real life version of this ASCII emoji -> Ż\_(ツ)_/Ż ?

No success with the SD and/or crew rectifying your deflated seat and you can't be/aren't accommodated to another J seat? If you asked for a compensation form and the SD says they have no idea what you are talking about, you can use the below picture of the stub portion to help freshen their memory (better than nothing)...

Please note that for the longest time, the "Green Compensation Form" version was used, and there have been recent reports of the "White Compensation Form" replacing the Green version. Reports here have indicated that the two forms are virtually identical except for the colour.
There is now an even newer White Form which explicitly lists "deflated seat" and "deflated seat and fixed", among many other items.

Here is a snapshot of the NEWEST full form (as of August 2019), courtesy of lallied

https://www.flyertalk.com/forum/31421855-post2093.html
Originally Posted by lallied
Clearly jinxed myself. New form in case hasnt been posted before.

Oops, see it has been. I just didn’t look far enough down ☹️


This is only the stub portion, courtesy of lallied





Originally Posted by lallied



There’s a main section which the SD fills in and detachable section you get to keep. Each has a reference number. It looks like the green one to me except it’s white.




Example

Mattress pads purchased and listed in this thread




Print Wikipost

Deflategate; new executive pods deflating in-flight

Old May 23, 2019, 4:00 pm
  #1831  
 
Join Date: Dec 2011
Location: YYZ
Programs: AC SEMM / HH Diamond
Posts: 3,150
Originally Posted by canadiancow
Hmm I feel like my mattress pad partially deflated on my last flight. I need to test it out at home tonight before my trip tomorrow. If it's somehow gained its own puncture, Amazon is going to see a bad review.

It's equally likely I just didn't inflate it as much as I thought, or didn't close the seal properly. I just know it wasn't as firm as I expected when I woke up.
Apparently a mattress leak is contagious .... that would explain a lot.
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Old May 23, 2019, 4:32 pm
  #1832  
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Originally Posted by canopus27
Apparently a mattress leak is contagious .... that would explain a lot.
An SSSS prod was left protruding from cow, causing his glamping air mattress to leak.
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Old May 23, 2019, 4:36 pm
  #1833  
 
Join Date: Mar 2008
Programs: AC SE MM, Marriott Titanium
Posts: 904
Originally Posted by yyznomad
As per the wiki


@YVRtoYYZ @canadiancow @Bohemian1 @canopus27

Any reviews and any difficulties/challenges/tips using them in an AC DreamCabin deflated pod seat?
I've used my Klymit twice. Length is roughly from the headrest to the footstool. I intentionally bought this brand/model as it is narrower and fits perfectly in the 21" wide pod. Takes 8-9 breaths to fully inflate; easy to deflate/store within the confines of the pod. Only drawback is it raises you off the seat roughly 2" bringing you that much closer to the table tray if you are a side-sleeper.

But for me, really glad I made the purchase despite the higher cost than other options.
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Old May 23, 2019, 4:41 pm
  #1834  
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Originally Posted by YVRtoYYZ
I've used my Klymit twice. Length is roughly from the headrest to the footstool. I intentionally bought this brand/model as it is narrower and fits perfectly in the 21" wide pod. Takes 8-9 breaths to fully inflate; easy to deflate/store within the confines of the pod. Only drawback is it raises you off the seat roughly 2" bringing you that much closer to the table tray if you are a side-sleeper.

But for me, really glad I made the purchase despite the higher cost than other options.
8 to 9 breaths... that's it? not bad.
It also looks ribbed for his/her pleasure as well.
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Old May 23, 2019, 4:47 pm
  #1835  
 
Join Date: Mar 2008
Programs: AC SE MM, Marriott Titanium
Posts: 904
Originally Posted by yyznomad
8 to 9 breaths... that's it? not bad.
It also looks ribbed for his/her pleasure as well.
Oh...it gives far more pleasure than sitting on a deflated seat.
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Old May 23, 2019, 4:59 pm
  #1836  
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Originally Posted by YVRtoYYZ
Oh...it gives far more pleasure than sitting on a deflated seat.
After blowing 8 or 9 times, I sure hope so.
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Old May 23, 2019, 5:11 pm
  #1837  
 
Join Date: Mar 2008
Programs: AC SE MM, Marriott Titanium
Posts: 904
Originally Posted by yyznomad
After blowing 8 or 9 times, I sure hope so.
And even better, it only takes the 8-9 blows to get it hard.
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Old May 23, 2019, 5:49 pm
  #1838  
 
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Posts: 6,211
I'm glad we can all still get a laugh out of this 'sit'uation.
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Old May 23, 2019, 8:17 pm
  #1839  
 
Join Date: Jan 2001
Programs: AC SEMM
Posts: 724
Originally Posted by Stranger
These values are likely not correct. These must be designed for a much higher pressure. I cannot imagine that the system would let pressure go down and then back up again when the plane goes down before landing.
I assume you are referring to mattress inflation pressure, as the pressures at altitude are easily confirmed. I would argue that mattress inflation pressure cannot be that much higher than what i proposed. Consider a 100 kg person sitting on the cushion engaging an area 0.5 x 0.5 m2 say. Pressure is then ~1000 N /0.25 m2 =4000 Pa =4 KPa ~ 0.6 psi. We know by experience that the cushion deforms as we sit on it, thus the mattress pressure must be comparable to this extra distributed force... let's say my numbers are low, and the inflation pressure is six-fold, at about 3 psi. The pressure change due to flight is still comparable. If the system does not pressure relieve then my point is even more valid - in flight the pressure differential driving the leak is even bigger! However that would make the cushion noticeably stiffer. If your disbelief comes from the unlikeliness of having a pressure control valve, the other possibility is that there is some natural leakage rate of the system, and the pumps are always working, or perhaps the relief valve is a simple flap valve that responds to significant over-pressure. In all cases, my point remains valid, which is that there is likely an over-pressure cycle on take-off that might make a leak noticeable only after take-off.
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Old May 23, 2019, 9:46 pm
  #1840  
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Originally Posted by visitor
I assume you are referring to mattress inflation pressure, as the pressures at altitude are easily confirmed. I would argue that mattress inflation pressure cannot be that much higher than what i proposed. Consider a 100 kg person sitting on the cushion engaging an area 0.5 x 0.5 m2 say. Pressure is then ~1000 N /0.25 m2 =4000 Pa =4 KPa ~ 0.6 psi.
You think if no one is sitting then the pressure is zero? In other words, you need to account for hoop stress.
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Old May 23, 2019, 10:27 pm
  #1841  
 
Join Date: Jan 2001
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Originally Posted by Stranger
You think if no one is sitting then the pressure is zero? In other words, you need to account for hoop stress.
Indeed. Here is the thought experiment: Consider a thin wall tube, uniform wall thickness, stresses are small (even for polymer above Tg) so OK to treat it as inextensible, ignore bending stiffness (membrane only as T>Tg and thin wall). Initially, internal pressure is equilibriated by hoop stress, shape is circular. Now apply a vertical force due to body weight. Shape deforms, elliptical. In vertical direction, equilibrium is net pressure (which is original pressure) x resolved horizontal area reacted by hoop stress x total wall area. In horizontal direction, equilibrium is total pressure (original pressure + pressure due to passenger weight) x smaller resolved vertical area reacted by same hoop stress x same total wall area. This can be solved to give aspect ratio of ellipse in terms of ratio of passenger weight pressure to initial pressure. Clearly if ratio of these pressures is small then the cross-section does not deform, shape remains essentially circular. If there is any appreciable deformation, then this indicates that passenger weight pressure is comparable to original internal pressure.

Apologies if some detail is wrong, but this is how I would go about solving analytically to get a feel for key parameters. Real geometry is of course more complex, so FE would be the obvious brute force solution. However, I would expect that my observation stands: if the cushion deforms when I sit on it, then the internal pressure is comparable to my body weight pressure.
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Old May 24, 2019, 12:50 am
  #1842  
 
Join Date: Jan 2009
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Had my first deflated seat in 6 months a few days ago on AC 61.

My seat was flat upon boarding, so I asked that maintenance be called to change the bladder. There were at least two other seats deflated upon boarding, so maintenance had to deal with those too.

Maintenance arrived, reset the seat and assured me that it will not deflate again-- talked about it being a pump issue. He said the Captain should so a full reset of the system each time he is preparing for the flight and these issues would be avoided

The inflation did last almost 6 hours, but then deflated and then kept deflating despite resets... Each time one of the SDs would ask me 'Is it working now?'....this is despite me explaining that it wont actually 'work' as there is a hole in the seat bladder and that it should have been changed.

I did deploy my inflatable mattress for the first time, and the SD thought that was 'hilarious'. Slept well after that,

I did receive the compensation form.
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Old May 24, 2019, 8:18 am
  #1843  
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Originally Posted by visitor
Indeed. Here is the thought experiment: Consider a thin wall tube, uniform wall thickness, stresses are small (even for polymer above Tg) so OK to treat it as inextensible, ignore bending stiffness (membrane only as T>Tg and thin wall). Initially, internal pressure is equilibriated by hoop stress, shape is circular. Now apply a vertical force due to body weight. Shape deforms, elliptical. In vertical direction, equilibrium is net pressure (which is original pressure) x resolved horizontal area reacted by hoop stress x total wall area. In horizontal direction, equilibrium is total pressure (original pressure + pressure due to passenger weight) x smaller resolved vertical area reacted by same hoop stress x same total wall area. This can be solved to give aspect ratio of ellipse in terms of ratio of passenger weight pressure to initial pressure. Clearly if ratio of these pressures is small then the cross-section does not deform, shape remains essentially circular. If there is any appreciable deformation, then this indicates that passenger weight pressure is comparable to original internal pressure.
Slowly getting there, but not quite. Even if wall is thin, stresses need not be small even if inextensible. Ratio between stress and displacement is given by the modulus of elasticity. Consider a rectangular cross-section rather than round, makes the reasoning easier (although that will entail some stiffening that will support bending). But anyway, then in the absence of load, stress on the sides is due to difference of pressure outside and inside, times horizontal cross-section. If when adding a load (you or me), top stays flat, then the normal stress in the side walls drops, but pressure inside does not change.
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Old May 24, 2019, 5:03 pm
  #1844  
 
Join Date: Dec 2005
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On May 1, 2019, I noticed lower part of executive seat was extremely hard and deflated on AC92 while at gate in YYZ. Notified cabin crew during boarding and, within 5 minutes, a tech came on board, removed both the cloth covering on seat and deflated bubble support layering and replaced it with new bubble support layer. This took all of 5 minutes for him to complete. Super comfortable and no issues throughout long flight to SCL. Had I not seen this posting about the deflation issues, I would not have even known to notify cabin crew. Handled professionally and without the attitude that I usually find on US carriers.

Merci,

putongo
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Old May 24, 2019, 5:43 pm
  #1845  
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Preparing for 4 flights this weekend. Just testing it to make sure it doesn't have its own issue.

Also, it took a little under 10 full breaths to inflate.

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