First air leak crack on ISS has not grown
A inspection of the first air leak crack that had been found and patched in the Zvezda module on ISS last year has found that it apparently not increased in size since then.
The size of a crack in the intermediate chamber of the Russian Zvezda module aboard the International Space Station (ISS) remains unchanged, cosmonaut Sergei Ryzhikov reported to Russia’s Flight Control Center on Wednesday. “It [the length] has not changed. As in the previous measurements, I do not see any changes,” Ryzhikov said during his talks with Mission Control broadcast on NASA’s website.
On February 23, the cosmonaut carried out work with a microscope to trace another possible air leak. The photos of the work were transmitted to Earth and the video from GoPro cameras will be sent via the Russian broadband communications system. After completing the work, the cosmonaut reinstalled the patch in the area of the crack.
This Russian report is decidedly unclear about some details. Though it appears the astronaut was using the microscope to inspect another leak, he also apparently removed the patch on the first leak to check the crack for any changes, then replaced it. How one removes and replaces such a patch is a puzzle however. Such things are generally not removable.
No matter. The important detail is that the crack has not grown. If it was a stress fracture the recent dockings of spacecraft to the nearby port might cause it to grow. That it has not is good news.
The bad news is that the inspection did not find the second small leak that is thought to be in this same Zvezda module.
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A inspection of the first air leak crack that had been found and patched in the Zvezda module on ISS last year has found that it apparently not increased in size since then.
The size of a crack in the intermediate chamber of the Russian Zvezda module aboard the International Space Station (ISS) remains unchanged, cosmonaut Sergei Ryzhikov reported to Russia’s Flight Control Center on Wednesday. “It [the length] has not changed. As in the previous measurements, I do not see any changes,” Ryzhikov said during his talks with Mission Control broadcast on NASA’s website.
On February 23, the cosmonaut carried out work with a microscope to trace another possible air leak. The photos of the work were transmitted to Earth and the video from GoPro cameras will be sent via the Russian broadband communications system. After completing the work, the cosmonaut reinstalled the patch in the area of the crack.
This Russian report is decidedly unclear about some details. Though it appears the astronaut was using the microscope to inspect another leak, he also apparently removed the patch on the first leak to check the crack for any changes, then replaced it. How one removes and replaces such a patch is a puzzle however. Such things are generally not removable.
No matter. The important detail is that the crack has not grown. If it was a stress fracture the recent dockings of spacecraft to the nearby port might cause it to grow. That it has not is good news.
The bad news is that the inspection did not find the second small leak that is thought to be in this same Zvezda module.
I must unfortunately ask you for your financial support because I do not depend on ads and rely entirely on the generosity of readers to keep Behind the Black running. You can either make a one time donation for whatever amount you wish, or you sign up for a monthly subscription ranging from $2 to $15 through Paypal or $3 to $50 through Patreon.
Your support will allow me to continue covering science and culture as I have for the past twenty years, independent and free from any outside influence.
Your support is even more essential to me because I not only keep this site free from advertisements, I do not use the corrupt social media companies like Google, Twitter, and Facebook to promote my work. I depend wholly on the direct support of my readers.
You can provide that support to Behind The Black with a contribution via Patreon or PayPal. To use Patreon, go to my website there and pick one of five monthly subscription amounts, or by making a one-time donation. For PayPal click one of the following buttons:
If Patreon or Paypal don't work for you, you can support Behind The Black directly by sending your donation by check, payable to Robert Zimmerman, to
Behind The Black
c/o Robert Zimmerman
P.O.Box 1262
Cortaro, AZ 85652
Or you can donate by using Zelle through your bank. You will need to give my name and email address (found at the bottom of the "About" page). The best part of this electronic option is that no fees will be deducted! What you donate will be what I receive.
The article sure isn’t detailed, but they could have done some non destructive testing to look at the crack under the patch.
John wrote: “but they could have done some non destructive testing to look at the crack under the patch.”
It depends upon what is available aboard the ISS or what they can take up there. They don’t seem to have much available to do these kinds of tests. Interestingly, they don’t even have much for finding leaks, because they had to use tea leaves to find this one. Written that way, it seems mystical rather than scientific, but it also was innovative.