Most active commenters
  • jasonlotito(4)
  • the__alchemist(3)

←back to thread

278 points Michelangelo11 | 68 comments | | HN request time: 0.637s | source | bottom
1. dfox ◴[] No.45040695[source]
The article is somewhat sensationalistic. If you read the actual report you will find out that:

The pilot was not part of the conference call!

What froze was not hydraulic fluid for actuators (in some hydraulic line), but hydraulic fluid in the shock absorbers.

The last paragraph of the article and seems to be missing a few words and reads as the investigators blaming the people directly involved, which is essentially a complete opposite of what conclusions of the report say.

replies(13): >>45041203 #>>45041205 #>>45041260 #>>45041299 #>>45041304 #>>45041313 #>>45041359 #>>45041599 #>>45041942 #>>45041944 #>>45042051 #>>45042571 #>>45044912 #
2. ◴[] No.45041203[source]
3. LeifCarrotson ◴[] No.45041205[source]
If you want to read the actual report, it's not linked from the CNN article, but it's available here:

https://www.pacaf.af.mil/Portals/6/documents/3_AIB%20Report....

Edit: While CNN says the air force blamed the crash on ice in the hydraulic lines, it's obvious that ice can't be legally culpable. The report actually says:

> Additionally, the [Accident Investigation Board] president found, by a preponderance of the evidence, that crew decision making including those on the in-flight conference call, lack of oversight for the Hazardous materials program, and lack of adherence to maintenance procedures for hydraulic servicing were substantially contributing factors.

They note further down that "The 355th FGS hazardous materials program (HAZMAT) program suffered from insufficient manning and frequent supervision changes at times relevant to the mishap." Basically, they had a barrel of hydraulic oil that sat outside and no one took care of it.

Also interesting is the 6 February 2025 incident, where another aircraft, barely a week after the one that crashed, had the same issue. They tested it inside a heated hangar, then outside in the 15F cold where they reproduced the weight-on-wheels sensor malfunctions, then brought it back in and drained the hydraulic fluid...there's a TON of water in those lines! I'm more familiar with industrial hydraulics in factories and earth-moving equipment, not with aviation...but we have water separators because a few drops of water can be enough to mess with the servo valves when you're near caviation limits. "...approximately one third of the fluid retrieved from the [landing gear] was water" is NOT RIGHT.

Also, I chuckled on reading "...the barrel tested with more than 1024 parts per million (ppm) particulates, which is more than double the allowable limit for particulates in hydraulic fluid... It is important to note that the test does not accurately measure contaminates above 1024ppm, so the contamination was potentially far greater than 1024ppm"

Gives strong "3.6 roentgen, not great, not terrible" vibes!

replies(3): >>45042154 #>>45042210 #>>45045489 #
4. diggan ◴[] No.45041260[source]
> The article is somewhat sensationalistic

somewhat sensationalistic?! The article clearly tries to give the impression the pilot was on the call:

> A US Air Force F-35 pilot spent 50 minutes on an airborne conference call with Lockheed Martin engineers trying to solve a problem with his fighter jet before he ejected

Knowing the quality of media these days, it wouldn't surprise me if it CNN just got it really wrong, but also wouldn't surprise me they'd do some brazen lie for clicks.

Edit: Reading the report, it seems like you, dear fellow HN commentator, got it wrong in this case, sorry to say :) Seems indeed the pilot itself was on the call:

> The mishap pilot (MP), assigned to the 354th FW, ejected safely before impact. [...] The MP initiated a conference call with Lockheed Martin engineers. The MA held for approximately 50 minutes while the team developed a plan of action

Page 35 from https://www.pacaf.af.mil/Portals/6/documents/3_AIB%20Report....

replies(4): >>45041412 #>>45043140 #>>45043821 #>>45044870 #
5. andy_xor_andrew ◴[] No.45041299[source]
I read the article (twice) and I still have the impression the pilot was in fact the one in the conference call

Opening line:

> A US Air Force F-35 pilot spent 50 minutes on an airborne conference call with Lockheed Martin engineers trying to solve a problem with his fighter jet before he ejected

Am I illiterate or misreading it?

> After going through system checklists in an attempt to remedy the problem, the pilot got on a conference call with engineers from the plane’s manufacturer, Lockheed Martin, *as the plane flew near the air base. *

Is this actually some insane weasel-wording by CNN? "We never said the pilot (he is in fact a pilot) was the one flying the jet, we just said 'as the plane flew', not 'as he flew the plane', using passive voice, so we're not wrong - but it was another pilot flying the plane"

replies(3): >>45041365 #>>45041446 #>>45041702 #
6. ozim ◴[] No.45041304[source]
Still interesting part is: them trying to fix the problem - made the plane crash.

Of course it couldn’t land but still, tweaking stuff while flying was ultimately causing loss of control.

replies(1): >>45041472 #
7. CamperBob2 ◴[] No.45041313[source]
The last paragraph of the article and seems to be missing a few words

Something, something, mote in your neighbor's eye, mumble, something...

replies(1): >>45041466 #
8. weaksauce ◴[] No.45041359[source]
> Briefly stated, the Gell-Mann Amnesia effect is as follows. You open the newspaper to an article on some subject you know well. In Murray’s case, physics. In mine, show business. You read the article and see the journalist has absolutely no understanding of either the facts or the issues. Often, the article is so wrong it actually presents the story backward — reversing cause and effect. I call these the “wet streets cause rain” stories. Paper’s full of them.

> In any case, you read with exasperation or amusement the multiple errors in a story, and then turn the page to national or international affairs, and read as if the rest of the newspaper was somehow more accurate about Palestine than the baloney you just read. You turn the page, and forget what you know.

basically that and the knoll's law on media accuracy:

> Knoll’s law of media accuracy is the adage that “everything you read in the newspapers is absolutely true, except for the rare story of which you happen to have firsthand knowledge”.

replies(1): >>45043165 #
9. the__alchemist ◴[] No.45041365[source]
Don't read the article; read the report.
replies(2): >>45041410 #>>45041421 #
10. SalmoShalazar ◴[] No.45041410{3}[source]
I’m guessing you also didn’t read the report given that he was indeed on the conference call.
replies(1): >>45041900 #
11. the__alchemist ◴[] No.45041412[source]
SOF initiates Conference Hotel procedures, FYI. It's a (rarely used) checklist in their book. SOF is the pilot sitting in the tower to liase with ATC and handle emergencies from an ops perspective.
replies(1): >>45042028 #
12. andy_xor_andrew ◴[] No.45041421{3}[source]
Sure, of course I will trust the report as the source of truth.

But I'm interested in the reporting. There are, you know, journalistic standards, which are considered kinda "journalism 101"! For instance, getting the basic facts of a story correct - especially the facts stated in the headline.

So I'm curious, did the reporter do their due diligence, and write the article in a way that is factually correct, but highly misleading? Or did they simply not follow basic reporting protocol?

replies(6): >>45041509 #>>45041948 #>>45042094 #>>45042400 #>>45042616 #>>45043499 #
13. dwpdwpdwpdwpdwp ◴[] No.45041446[source]
From the report:

> The MP initiated a conference call with Lockheed Martin engineers through the on-duty supervisor of flying (SOF)

"MP" is the pilot

> A conference hotel is a call that can be initiated by the SOF to speak directly with Lockheed Martin engineers to discuss an abnormality/malfunction not addressed in the PCL (Tab V-13.1, 14.1, 15.1, 16.1, 17.1). While waiting for the conference hotel to convene, the MP initiated a series of “sturns” with gravitational forces up to 2.5Gs, as well as a slip maneuver (i.e., left stick input with full right rudder pedal) to see if the nose wheel orientation would change (Tabs N-12, BB-201- 02). Upon visual inspection, the MW reported no change to the nose wheel (Tab N-13). The SOF informed the MP he was on the phone with the conference hotel and Lockheed Martin were getting the LG subject matter experts (SME)

So the pilot was, in effect, on the call, even if not directly on the phone. I don't know for sure, but I'm guessing an F-35 pilot had radio comms with the SOF who was on a phone line. It's a layer of indirection, but the pilot was essentially exchanging info in real time with the conference call. Its not a stretch to colloquially say that the pilot was "in the conference call"

14. grues-dinner ◴[] No.45041466[source]
Muphry's Law strikes again: https://en.wikipedia.org/wiki/Muphry%27s_law
15. LeifCarrotson ◴[] No.45041472[source]
The report actually says it could have landed. A week later, another F35 at the same base had the same problem, it landed with its nose gear 6 degrees off center and the pilot barely noticed.

Basically, Lockheed Martin engineers told the air force to attempt re-centering with touch-and-go landings, but didn't realize that this could mess with the weight-on-wheels sensors and cause it to switch flight modes.

replies(2): >>45041991 #>>45042013 #
16. the__alchemist ◴[] No.45041509{4}[source]
The article is standard news stuff. It is sloppy and misleading. The report is what you want.
17. RyanOD ◴[] No.45041599[source]
And, of course, CNN only links to their own articles. Why bother linking to the actual report? The rise in sites that only link to themselves 99% of the time really frustrates me.
replies(2): >>45041690 #>>45041754 #
18. MostlyStable ◴[] No.45041690[source]
Journalism's failure to adopt linking to sources etc in the internet age is kind of infuriating. I get it, back in physical newspaper/magazine days, linking wasn't possible, and it takes a while for new norms to change and habits to form, but articles have been internet-first for well over a decade at this point. It should be completely unacceptable not to have linking to sources whenever relevant. I'm not sure I have ever found a news article that makes finding the original source or subject of the article easy. Certainly not on mainstream news outlets.
replies(7): >>45041850 #>>45042174 #>>45042190 #>>45043156 #>>45043271 #>>45043751 #>>45043767 #
19. nathan_douglas ◴[] No.45041702[source]
> The MP initiated a conference call with Lockheed Martin engineers through the on-duty supervisor of flying (SOF). The MA held for approximately 50 minutes while the team developed a plan of action.

I read this as "The pilot initiated a conference call, but was put on hold [i.e. not actually in the conference call in any meaningful way]." So he was both on and not on the conference call.

The Zen Koan of the Mishap Pilot. Sounds like an Iron Maiden song.

20. tracker1 ◴[] No.45041754[source]
We're CNN, you trust us right? I mean, why wouldn't you trust us in referring to ourselves? Because, we say so, so you have to believe us.
21. RyanOD ◴[] No.45041850{3}[source]
Sites with no external linking are like highways with no exits.
replies(1): >>45042800 #
22. eduction ◴[] No.45041900{4}[source]
One clear indication he was not, from PDF p14 (8 as numbered) ("MP"="mishap pilot"):

"At 21:12:52Z, the SOF informed the MP, “Alright the engineers uh are not optimistic about this COA but, extremely low PK [probability kill, meaning the probability this would fix the issue], but we’re going to try anyway is a touch-and-go on the runway, mains only, do not touch the nose gear, uh lift back off in all cases and have the uh have Yeti 4 reconfirm the nose gear position once your safely airborne.”"

No need for this if the pilot was on the call directly.

replies(1): >>45042640 #
23. avs733 ◴[] No.45041942[source]
To clarify because everyone is confused here. The report is a little vague and information is buried in a couple places. Using PDF page numbers

> "The MP responded “14.5” ... and then opined a “conference hotel” was appropriate for this situation (Tab N-12)." (pg. 13)

> "The MP, utilizing the on-duty supervisor of flying (SOF) in the air traffic control (ATC) tower, initiated a conference call with Lockheed Martin (LM)" (pg. 8)

> "The SOF informed the MP he was on the phone with the conference hotel and Lockheed Martin were getting the LG subject matter experts (SME) on the line ...no transcript is available because the call was made on a personal phone rather than the legal voice recorder in the air traffic control tower" (pg. 13)

in the last statement, he means that the SOF was informing the MP that the SOF was on the conference call and would relay information. The mishap pilot (MP) was speaking to the supervisor of flying (SOF), almost certainly via radio. He asked the SOF, in the control tower to set up a conference call. For reasons, maybe of expediency or technical failure, or norms or something, the SOF made that call on his personal cell phone. The MP was not 'on the phone' but the SOF would have primaily functioned as a relay between radio and phone. The purpose of the call was to get information from the pilot to the engineers and from the engineers to the pilot. Aviate, Navigate, Communicate* means he doesn't need to cognitive load of actually listening as the SOF and engineers think through what to do and decide on a plan. He needs to fly the plane and provide information necessary to help figure out how to aviate.

If you want to harp on CNN for accuracy, I'm sure there are plenty of opportunities but this feels pedantic. It is like saying 'the astronauts weren't talking to mission control, they were talking to the capcom. Only the capcom talked to mission control'.

I suspect that in the non-public version of this report there is more discussion of the decision and alternatives to doing that call on a personal cell phone for two reasons. (1) As noted in the report it means that conference isn't recorded and a transcript is not available to the investigators (thats shocking to me). (2) Detailed aircraft systems information, which is highly controlled, is being discussed on an open line.

* Funny enough, the third time the report defines SOF, they have a typo "supervisor of lying" (pg. 36)

replies(1): >>45042653 #
24. WalterBright ◴[] No.45041944[source]
Sounds like the sensationalistic and woefully inaccurate media reporting of the MAX crashes.
25. hluska ◴[] No.45041948{4}[source]
I’m curious why you’re getting this worked up when the report is clear that the pilot was part of the information flow in that conference call. This is a really minor case of a headline using less precise language.
26. stackskipton ◴[] No.45041991{3}[source]
I’ve always wondered why weight on wheel modes don’t have more checks, detecting weight on wheels but seeing 150+ Indicated Air speed and RALT is greater then 15ft, maybe issue caution instead of screwing with flight mode.
replies(1): >>45043873 #
27. aidenn0 ◴[] No.45042013{3}[source]
Not being able to do a touch-and-go without crashing afterwards seems like a significant flaw in the aircraft.

Isn't there an arrested-landing equipped version of the F35? Could this same problem happen with a bolter?

replies(1): >>45044075 #
28. mulmen ◴[] No.45042028{3}[source]
To the uninitiated: SOF is Supervisor of Flying.
replies(2): >>45042714 #>>45043178 #
29. pbasista ◴[] No.45042051[source]
> The pilot was not part of the conference call!

Thank you. If I cannot even trust one of the substantial parts of the headline to be true, then my interest to read or even care about such an article is reduced to almost zero.

30. mulmen ◴[] No.45042094{4}[source]
> There are, you know, journalistic standards

Are there? What are they?

31. themaninthedark ◴[] No.45042154[source]
Of note to readers not familiar with hydraulic fluid, it is hygroscopic:

>Passenger safety requires that in commercial airplanes hydraulic actuators be powered by fire-resistant hydraulic fluids. As a downside, such fluids are hygroscopic which means that these tend to accumulate humidity from the environment

https://www.mdpi.com/2227-9040/8/4/131

replies(1): >>45042536 #
32. chiefalchemist ◴[] No.45042174{3}[source]
If they’re not providing essential links then it’s not journalism. They shouldn’t be given credit for a title they are not earning.

If you pet barks, do you still call it a cat? Of course not.

Links make it journalism. Not linking makes it reporting. They should not be considered synonymous.

The point is, people who should know better keep calling the likes of CNN journalism and those who don’t know any better keep believing they’re consuming content and forming understanding based on journalism.

33. verdverm ◴[] No.45042190{3}[source]
They complain about how social media links to them, while they are equally guilty of link shenanigans
34. hopelite ◴[] No.45042210[source]
Thanks for breaking that down. None of that surprises me and it's basically what I was expecting. This report gives a glimpse into the reality of the US military behind the propaganda facade and the massive margins for error stuffed with money.
35. throwawayoldie ◴[] No.45042400{4}[source]
> There are, you know, journalistic standards, which are considered kinda "journalism 101"!

Pretty sure you meant to use the past tense here: "There _were_ journalistic standards..."

36. halifaxbeard ◴[] No.45042536{3}[source]
The hygroscopic nature of hydraulic fluid is there for the same reason it is in car brake fluid-

it's better to evenly distribute water throughout the fluid, than to have it accumulate in a low point

replies(1): >>45044073 #
37. jasonlotito ◴[] No.45042571[source]
"The pilot was not part of the conference call!"

So, from the actual report:

> The MP initiated a conference call with Lockheed Martin engineers through the on-duty supervisor of flying (SOF). The MA held for approximately 50 minutes while the team developed a plan of action.

Seems like he was at some level a part of the conference call. Even if they are on hold, it still sounds like they were a part of it at some level. Seems reasonable to me.

38. jasonlotito ◴[] No.45042616{4}[source]
From the Report:

> The MP initiated a conference call with Lockheed Martin engineers through the on-duty supervisor of flying (SOF). The MA held for approximately 50 minutes while the team developed a plan of action.

Seems accurate to what CNN was reporting. It's simplified a bit, but it's not misleading to me.

I mean, I guess if you want to nit pick and suggest "No the pilot wasn't literally on a phone and there was an intermediary in between" or some such, but the report makes it seem like CNN is accurate.

https://www.pacaf.af.mil/Portals/6/documents/3_AIB%20Report....

39. jasonlotito ◴[] No.45042640{5}[source]
From the Report:

> The MP initiated a conference call with Lockheed Martin engineers through the on-duty supervisor of flying (SOF). The MA held for approximately 50 minutes while the team developed a plan of action.

"though the SOF" implies a middle-man, but I imagine that's because you don't want literally hook up a conference call directly to the cockpit. That being said, seems like the pilot was effectively on the conference call.

Unless you want to suggest I don't trust the report?

https://www.pacaf.af.mil/Portals/6/documents/3_AIB%20Report....

replies(1): >>45043973 #
40. jasonlotito ◴[] No.45042653[source]
> If you want to harp on CNN for accuracy, I'm sure there are plenty of opportunities but this feels pedantic. It is like saying 'the astronauts weren't talking to mission control, they were talking to the capcom. Only the capcom talked to mission control'.

Um, actually, they were talking to a mic. And the mic converted the noise... /s

But yeah, excellent comment here.

replies(1): >>45044804 #
41. esseph ◴[] No.45042714{4}[source]
Thanks!
42. jjk166 ◴[] No.45042800{4}[source]
Backed up, slow, and avoided by those familiar with the area?
43. jonas21 ◴[] No.45043140[source]
You omitted an important part of the sentence (in italics below):

> The MP initiated a conference call with Lockheed Martin engineers through the on-duty supervisor of flying (SOF). The MA held for approximately 50 minutes while the team developed a plan of action.

So it was the SOF on the conference call, relaying information to and from the pilot over the radio. This is more clear if you read the sequence of events on pages 7-10.

Not that it makes that much of a difference. Either way, he's up there waiting for the engineers on the ground to troubleshoot the problem.

replies(1): >>45043516 #
44. sho_hn ◴[] No.45043156{3}[source]
> Journalism's failure to adopt linking to sources etc in the internet age is kind of infuriating.

Possibly my greatest disappointment with the internet.

45. banku_brougham ◴[] No.45043165[source]
Knoll's law, I'll remember this.
46. CapricornNoble ◴[] No.45043178{4}[source]
Classic DoD with its overloaded acronyms. I first read the sentence thinking "what does this have to do with Special Operations Forces"?
replies(1): >>45043691 #
47. ◴[] No.45043271{3}[source]
48. hnburnsy ◴[] No.45043499{4}[source]
>But I'm interested in the reporting. There are, you know, journalistic standards, which are considered kinda "journalism 101"! For instance, getting the basic facts of a story correct - especially the facts stated in the headline.

Every single story is like this, every one, and f-them for not linking to the source documents.

49. diggan ◴[] No.45043516{3}[source]
Confusingly enough, there are these two parts in the previously linked document:

> The MP initiated a conference call with Lockheed Martin engineers. The MA held for approximately 50 minutes while the team developed a plan of action - Page 35

And

> The MP initiated a conference call with Lockheed Martin engineers through the on-duty supervisor of flying (SOF). The MA held for approximately 50 minutes while the team developed a plan of action - Page 2

I quoted from the Page 35, you quoted from the Page 2, not confusing at all of them to have very similar stuff with slightly different meaning, all in the same document :) Thanks nonetheless for the additional context!

50. BHSPitMonkey ◴[] No.45043691{5}[source]
> Classic DoD with its overloaded acronyms.

What does Depth of Discharge have to do with anything?

51. eastbound ◴[] No.45043751{3}[source]
It’s infuriating because, when debating, we’re asked to cite our sources.

We’d like to cite sources but journalists don’t cite theirs.

Now consider this: When you know journalists are spreading a lie, you can show the article and the scientific study which says the opposite, because people always claim that it isn’t the study cited by the article.

Case in point: I remember this article from the BBC titled “It’s proven, women are smarter than men. [In a scientific study about multitasking, …]”

The scientific paper published the month before on the same subject had an abstract that finished with “…, therefore we cannot conclude that women are smarter than men.”

I was particularly angry because it participated to the 2017 wave, and it was about multitasking, and once again it said women are 5s faster on a 170s task (with 15s stddev), but the study didn’t underline the accuracy of the two tasks in parallel, which was worse for women than men.

Anybody who mocks me about competing with girls, should respond why the BBC need to publish a petty news article about women being smarter.

52. LorenPechtel ◴[] No.45043767{3}[source]
If you link to something external the eyeballs leave and that's undesirable.
53. charlieo88 ◴[] No.45043821[source]
dang, I was looking forward to reading about the same F150 CarPlay and MS Teams being available in f35.
54. LorenPechtel ◴[] No.45043873{4}[source]
Yeah, they put too much faith in their sensors. Too many planes have crashed because of blind reliance on sensors that sometimes fail. Cross check whether things make sense before doing potentially catastrophic actions.

And don't skimp on the maintenance budget. Sounds like they had too much to do, too few people to do it, leading to not taking proper care.

55. eduction ◴[] No.45043973{6}[source]
What I said is he was not on the call /directly/.

You can argue over whether he was “effectively” on the call because someone was summarizing it for him per what I quoted.

I just think it’s worth nothing he was not “on” the call the way someone is traditionally on a conference call.

56. Bjartr ◴[] No.45044073{4}[source]
That's actually a really cool way to deal with that problem!
replies(1): >>45044257 #
57. dfox ◴[] No.45044075{4}[source]
The mishap involves doing touch-and-go twice with an arrested landing capable version of the aircraft. The report even says that they considered doing arrested landing, but it was deemed as too much risk for the pilot (apparently the actual flight manual of F-35A advises against trying that with non-centered NLG), because the ways how that could go horribly wrong do not allow for safe ejection.
58. mrguyorama ◴[] No.45044257{5}[source]
It is. Right up until you go to hit your brakes hard and it all boils out and removes your ability to apply brake pressure in an emergency and you had no idea how much water was in your line because there's no easy way to check, like a low spot with a sight glass.

Or if you leave a barrel of hydraulic fluid outside until it is partially water and it's not easy to notice when you are handling it.

replies(2): >>45044801 #>>45044943 #
59. wiml ◴[] No.45044801{6}[source]
I think my mental model of hydraulic brakes is too simple. Where is there a low pressure region in a brake line? When I stomp on the brakes, isn't the working part of the hydraulic system going to be at higher pressure?
replies(1): >>45045052 #
60. avs733 ◴[] No.45044804{3}[source]
I’m sorry but it’s not noise its an electrical signal

(This argument also failed to convince my mom my teenage band didn’t suck)

61. etler ◴[] No.45044870[source]
I think there's just some nuance to the scenario. The pilot wasn't directly on the call, but was participating in the call with the flight supervisor relaying the information.

I'd compare it to being in the room with someone on a conference phone call and they're relaying the conversation to you and them both ways. I would still say you were participating in the call even though you weren't directly on the call.

Also, he did initiate the call so "F-35 pilot held" is imprecise, but not totally wrong. Either way, the pilot was in an active tech support session with the plane engineers, making this one of the most intense tech support calls in history.

62. etler ◴[] No.45044912[source]
The call was being relayed to the pilot by the flight supervisor. While he wasn't "on" the call, I think it's fair to say he was "part" of the call. He's still getting live tech support and trying to trouble shoot the plane while flying it. He had an intermediary but I don't think that totally changes the scenario.
63. somerandomqaguy ◴[] No.45044943{6}[source]
Can't agree at all about a sight glass. The lowest point in nearly every brake system is the brake calipers themselves. Wheels going to make it difficult anyways on a car. Not to mention the risk of a rock striking and damaging rigid glass. Or the old interface that's sealing the glass to the calipers wearing out and causing a leak.

It's not worth the expense to manufacture and it's not worth the risk. Not when a litre of DOT4 is $20 and that only needs replacing every 3 years at an aggressive schedule for passenger cars.

Larger vehicles you can purchase a brake fluid tester, but most of the really large ones I know use air brakes anyways.

64. somerandomqaguy ◴[] No.45045052{7}[source]
There isn't a low pressure braking region in the brakes.

But brakes can get really hot. Passenger brakes can easily get over the boiling point of water. Keep braking long enough and adding enough heat, and they'll get over the boiling point of brake fluid under pressure.

Thing is, brake fluid is incompressible. Brake fluid vapor however is very much so a compressible gas. Even more so: the water in the brake fluid has an even lower boiling point then that.

So stomping on the braking quickly isn't going to cause much of a problem. But if your riding the brakes down hill for a long distance with 12 year old brake fluid in hot Florida summer on very heavily loaded car? That... might get you into a spot of trouble.

replies(2): >>45045650 #>>45045877 #
65. mvdtnz ◴[] No.45045489[source]
> Gives strong "3.6 roentgen, not great, not terrible" vibes!

What?

replies(1): >>45046091 #
66. lenocinor ◴[] No.45045650{8}[source]
I take your general point, but as per your specific example, it’s not really possible to go downhill for long distances when the high point of the state is 345 feet.
67. throwawaylaptop ◴[] No.45045877{8}[source]
I've gone down the Sonora grade in a Silverado with 22 year old brake fluid. I wasn't towing, but it was very hot out and in general yes the brakes were hot when I checked at around 4000 feet.

I wonder if some YouTuber has done some experiment to see just how bad fluid had to get before a typical driver could notice.

68. ahartmetz ◴[] No.45046091{3}[source]
In the Chernobyl TV series, they think they see a high but (short term) tolerable amount of radiation. It was actually just the upper limit of the measurement hardware and the real value was much higher.