More problems for F-22 beyond mysterious oxygen loss issue
July 16th, 2012
12:00 AM ET

More problems for F-22 beyond mysterious oxygen loss issue

By Mike Mount

Two recent in-flight emergencies involving troubled oxygen systems in the F-22 "Raptor" are unrelated to other, more worrisome breathing problems pilots have experienced for more than a year when flying the plane, according to U.S. Air Force officials.

The Air Force has been investigating why a number of F-22 pilots have experienced a mysterious loss of oxygen while in the air, causing dizziness and confusion known as hypoxia, since spring 2011.

But two recent incidents related to the F-22 oxygen system are considered regular mechanical issues not connected to the oxygen deprivation investigation, according to Air Force Lt. Col. Tadd Sholtis, a spokesman for the Air Force's Air Combat Command.

"The recent incidents that have resulted in new expressions of concern are of a different kind than the ones we have been focused on in recent months," Sholtis told CNN's Security Clearance.

Air Force officials have labeled the number of unexplained F-22 breathing incidents as "cause unknown," while labeling the two recent incidents as "cause known.

The latest problems prompted two members of Congress, Sen. Mark Warner, D-Virginia, and Rep. Adam Kinzinger, R-Illinois, to send a letter to the Air Force secretary last week demanding answers.

In an e-mail response to Security Clearance, Sholtis sent information on what Air Force initial investigations found in the two recent incidents. Sholtis said the mechanical issues were "not specific to the F-22 aircraft."

One of the incidents, an oxygen system malfunction on July 6, is still under investigation by the Air Force and the plane remains grounded, according to the Air Force information provided by Sholtis, but the incident is still listed as a "cause known" problem.

While returning from a training mission, the pilot from the 154th Wing of the Hawaii Air National Guard received a warning indication that the Onboard Oxygen Generating System (OBOGS) was malfunctioning and declared an in-flight emergency.

"The pilot experienced a hypoxic symptom in conjunction with the aircraft warning and activated the emergency oxygen system," according to the information given to Security Clearance. The pilot recovered and landed the plane without a problem after receiving emergency oxygen.

"The pilot has no lingering physiological effects and has returned to flight status. More details will be available when the investigation is complete, but we're confident the annunciation of the OBOGS warning during the flight points to the cause, which was a malfunction within the OBOGS," according to the information.

On June 26, an F-22 pilot from the 1st Fighter Wing was conducting routine flight operations out of Langley Air Force Base in Virginia. The pilot reported a "temporary restriction," in breathing and "was not receiving the normal flow of oxygen through the hose," to his face mask as he was on final approach. The pilot was able to land the plane safely, according to the information.

After parking the plane, the pilot remained in the cockpit and was instructed to engage the emergency oxygen system, the information said. The emergency system shoots pure oxygen into a pilot's mask as part of a safety protocol.

While the pilot was breathing the emergency air, he reported tightness in his chest for a short time, according to the information from Sholtis. It was later diagnosed as atelectasis related to breathing a high concentration of oxygen, the statement said. Altelectasis is defined as a partial or total lung collapse.

The unnamed pilot has since returned to flying and has flown five times since the June 26 incident with no aftereffects, according to the statement.

An investigation and analysis into what happened to the aircraft's oxygen system revealed a stuck valve. Audio recordings during the flight also registered the sounds of a stuck valve, the according to the information.

"To correct the mechanical issue, maintenance personnel removed and replaced the Breathing Regulator Anti-G (BRAG) valve, pilot breathing hoses, the Emergency Oxygen System (EOS) Regulator and the EOS shutoff valve," according to the statement.

Sholtis said the plane has since returned to service and the incident is listed as "cause known."

Warner and Kinzinger also asked about a May 31 incident where a F-22 crash landed when its wheels failed to extend upon landing. That incident was attributed to "a pilot new to the aircraft that involved no physiological symptoms and had no relation to the life support system," Sholtis said.

The Air Force has not released more information on the May incident, including details of how much damage was done to the service's most expensive aircraft.

Since the onset of the F-22 problems, the Air Force has taken a number of steps to mitigate more in-flight mystery incidents. Those steps include barring pilots from wearing an inflatable vest that assists their breathing during intense G-forces, as well as reducing the altitude the aircraft can fly.

Defense Secretary Leon Panetta also ordered the air service to keep F-22 flights to a limited area so pilots could safely return to a base if they experienced a problem with their oxygen systems.

Warner and Kinzinger also asked the Air Force for updated statistics on the number of hypoxia incidents on top of numbers already given to them by the Air Force.

Last month, the two members of Congress released numbers by the Air Force that showed pilots flying the F-22 Raptor reported illness from oxygen deprivation incidents 10 times as often as pilots of other fighter jets.

The data showed Raptor pilots have reported 26.43 hypoxia and hypoxia-like incidents per 100,000 flight hours. While that represents a mere fraction of total flight hours, it is far higher than incidents from other Air Force aircraft, including the A-10, the F-15E and the F-16.

But the two demanded new information when they saw higher numbers reported in media that did not reflect the earlier numbers they were given.

Sholtis said the Air Force was validating the numbers in response to the lawmakers' request, but said it does not look like there is an increase in the statistics already given.

Post by:
Filed under: Air Force • Congress • F-22 • Military
soundoff (229 Responses)
  1. zithromax drug

    side effects of zithromax 250 mg https://zithromaxes.com/ zithromax pills

    April 13, 2021 at 8:27 pm | Reply
  2. ebook

    Bses Yamuna Complaint Polytechnic Admission Date 2019-20

    My web site: ebook

    April 2, 2021 at 8:19 am | Reply
  3. polandsleep.e-kei.pl

    Chemistry Experiment Equipment Best Seller Books 2018 Young Adults

    My blog; bog (polandsleep.e-kei.pl)

    April 1, 2021 at 6:15 am | Reply
  4. pdf wordpress

    Holt Mcdougal Literature Interactive Reader Grade 10 Pdf Classic Books To Read
    Pdf

    My homepage ... pdf wordpress

    March 31, 2021 at 10:54 pm | Reply
  5. inbooks.atthost24.pl

    Definition Of Body Of Literature Jim Dale Leede Jones Gable

    Feel free to surf to my site; wordpress.com – inbooks.atthost24.pl

    March 31, 2021 at 10:46 am | Reply
  6. BillyDrack

    zithromax online pharmacy canada: zithromax tablets how to get zithromax
    https://zithromaxproff.com/# zithromax over the counter canada

    March 30, 2021 at 10:40 am | Reply
  7. wordpress.org

    Higher Education Youtube Popular Books Made
    Into Tv Shows

    Also visit my web page :: wordpress.org

    March 30, 2021 at 7:26 am | Reply
  8. doubledown casino promo codes forum

    clearwater casino poker tournaments https://casinoxsgames.com/ taxable win at slot at resorts world casino ny

    March 29, 2021 at 2:27 am | Reply
  9. maryland live casino slot play

    microsoft casino games online https://casinoxsonline.com/ vegas world slots casino free

    March 26, 2021 at 2:28 pm | Reply
  10. do i need active play pass to eat crab legs at gun lake casino buffet?

    casino table games las vegas free https://casinoxsbest.com/ hoyle casino games

    March 25, 2021 at 6:35 am | Reply
  11. best casino buffets las vegas

    +macao casino chips https://casinoxsbonus.com/ new casino opening an eye on california

    March 23, 2021 at 11:39 am | Reply
  12. winning slot machines at casino

    doubledown casino daily free chips https://casinoxsplay.com/ aol free games online casino vegas world

    March 22, 2021 at 9:38 am | Reply
  13. cyclosporine

    buy cyclomune online Cyclomune eye drops 0.05%

    March 14, 2021 at 8:00 pm | Reply
  14. avana

    avanafil avana canada

    March 14, 2021 at 6:14 pm | Reply
  15. brimonidine

    brimonidine generic buy brimonidine

    March 14, 2021 at 6:13 pm | Reply
  16. ClarkClurn

    za3j9 4kqha g8rm

    February 28, 2021 at 12:37 pm | Reply
  17. https://nerquililmond1989.netlify.app/

    English Language And Literature Journals With Impact Factor High Energy Physics
    Uu

    Here is my web page; pdf wordpress (https://nerquililmond1989.netlify.app/)

    February 17, 2021 at 4:53 pm | Reply
  18. Best-Social-Media-Services and-Traffic-2021

    1,000,000 GSA Live Backlinks High Quality SEO links + Bad Links Removal: https://www.seoclerk.com/Link-Building/842081/1-000-000-GSA-Live-Backlinks-High-Quality-SEO-links-Bad-Links-Removal

    https://www.seoclerk.com/Traffic/840816/1500-USA-Visitors-Daily-For-30-Days-From-Niche-Targeted-Organic-Traffic-From-Google

    February 16, 2021 at 7:55 pm | Reply
  19. malatya escort

    malatya escort bayanlarla tanışmak için bu siteyi ziyaret edebilirsiniz.

    https://www.yukle.tc

    February 16, 2021 at 4:02 pm | Reply
  20. buy zithromax

    zithromycin https://zithromaxes.com/ 500mg zithromax

    February 10, 2021 at 10:42 am | Reply
  21. arechin

    chlorowuine https://chloroquineorigin.com/ chloroquine antimalarial

    February 10, 2021 at 9:12 am | Reply
  22. side effects for plaquenil

    erectile dysfunction when viagra doesn t work https://plaquenilx.com/ erectile function trial offers in sarasota fl

    February 10, 2021 at 9:12 am | Reply
  23. hcq medication

    hydroxychloroquine tablet https://hydroxychloroquinex.com/ malaria usmle

    February 10, 2021 at 9:03 am | Reply
  24. tadalafil 40

    tadalafil 5mg tab https://tadalisxs.com/ what is vidalista

    February 10, 2021 at 8:40 am | Reply
  25. adana escort

    iskenderun escort bayanlarla tanışmak için bu siteyi ziyaret edebilirsiniz.

    http://www.cuba.tc/escort-kategori/adana-escort-bayan

    February 7, 2021 at 11:23 pm | Reply
  26. iskenderun escort

    iskenderun escort bayanlarla tanışmak için bu siteyi ziyaret edebilirsiniz.

    http://www.gu8.pw

    February 7, 2021 at 7:39 pm | Reply
  27. www.iskenderunescort.xyz

    iskenderun escort bayanlarla tanışmak için bu siteyi ziyaret edebilirsiniz.

    http://www.iskenderunescort.xyz

    February 7, 2021 at 12:30 am | Reply
  28. www.gu8.pw

    iskenderun escort bayanlarla tanışmak için bu siteyi ziyaret edebilirsiniz.

    http://www.gu8.pw

    February 6, 2021 at 11:01 pm | Reply
  29. mersin escort

    esenyurt escort bayanar bu sitede üstelik hepsi ücretsiz...

    http://www.elitescorthatun.com/ad-category/mersin-escort/

    February 5, 2021 at 11:40 am | Reply
  30. iskenderun escort

    iskenderun escort bayanlarla tanışmak için bu siteyi ziyaret edebilirsiniz.

    http://www.iskenderunescort.xyz

    February 5, 2021 at 5:02 am | Reply
  31. denizli escort

    http://www.denizlizuccaciye.com

    http://www.denizlizuccaciye.com

    February 5, 2021 at 3:52 am | Reply
  32. malatya escort

    esenyurt escort bayanar bu sitede üstelik hepsi ücretsiz...

    http://www.cuba.tc/escort-kategori/malatya-escort-bayan

    February 4, 2021 at 7:31 pm | Reply
  33. DFYPofitz Review

    Earn 500 a Day With Our Passive Income System Doing These 3 Steps – Step 1: Get our ready made niche websites, Step 2: Setup your Paypal account. Step 3: Run our Unlimited Traffic System from our Free 850 sources of traffic (Approximately 35000 views a day guaranteed). Then in few hours you will start receiving payments without do nothing! More info: https://warriorplus.com/o2/a/gp8vk/0

    https://bit.ly/32Pc9iD

    January 30, 2021 at 10:59 am | Reply
  34. Miss Wasyliszyn

    https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/

    January 28, 2021 at 10:04 pm | Reply
  35. Vaughn Farer

    Do you want get more social network traffic, likes, subscribers? Our Company provide SMM Services that means (Social Media Marketing) that is directly using social network websites such as Twitter, Facebook, and LinkedIn to promote a website. High Quality Services / Our prices are the cheapest in the market, starting at $0.01 / 24/7 Support / API Support for panel leaders / Best prices

    https://bit.ly/3iOPatX

    January 27, 2021 at 12:43 pm | Reply
  36. Lanell Riesinger

    Do you want get more social network traffic, likes, and retweets? SMM Supreme uses his own panel system to generate social media traffic to any website. Best Quality-Price Ratio on the market with 714928 orders until now. – Facebook Fan Page Likes: $4.50/1000 – Instagram Followers: $0.78/1000 – Youtube Views: $1.62/1000 – Twitter followers: $2.10/1000 – Paypal Deposit – Payeer Deposit – Automatic order processing – 30 minutes to send to customers

    https://bit.ly/2Hnl7vE

    January 27, 2021 at 1:47 am | Reply
  37. Charley Lanier

    Do you want get more social network traffic, likes, subscribers? Our Company provide SMM Services that means (Social Media Marketing) that is directly using social network websites such as Twitter, Facebook, and LinkedIn to promote a website. High Quality Services / Our prices are the cheapest in the market, starting at $0.01 / 24/7 Support / API Support for panel leaders / Best prices

    https://bit.ly/2Hnl7vE

    January 26, 2021 at 8:43 pm | Reply
  38. Rob Mccollester

    Best Marketing Services – Cheapest on Market. SMM Supreme is the Top 5 Best Social Media Website in the World. Best Quality-Price Ratio on the market with 714,928 orders until now. – Facebook Fan Page Likes for $4.50/1000 – Instagram Followers for $0.78/1000 – Youtube Views: $1.62/1000 – Twitter followers: $2.10/1000 – Paypal Deposit – Bitcoin Deposit – Fast order processing – 1 Hour Delivery (Click on the link in the profile for more details)

    https://bit.ly/3iVO2Vh

    January 26, 2021 at 4:47 pm | Reply
  39. Ute Much

    Social network traffic Facebook likes Twitter Followers Instagram Followers and much more

    https://bit.ly/3iVO2Vh

    January 22, 2021 at 9:27 pm | Reply
  40. Ellamae Oberbeck

    Heya this is a good write-up. I’m going to mail this to my buddies. I came on this while browsing on aol I’ll be sure to come back. thanks for sharing.

    http://yourmatrixcashmachine.com

    January 11, 2021 at 10:59 pm | Reply
  41. Imogene Rinn

    https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/

    January 11, 2021 at 12:48 am | Reply
  42. Reatha Francesconi

    The other day, while I was at work, my sister stole my apple ipad and tested to see if it can survive a 40 foot drop, just so she can be a youtube sensation. My apple ipad is now broken and she has 83 views. I know this is entirely off topic but I had to share it with someone!

    https://dreamproxies.com/

    January 10, 2021 at 9:06 am | Reply
  43. Hosea Harang

    I like this post, enjoyed this one appreciate it for putting up.

    https://Proxyti.com/buy/5000-private-proxies/

    January 3, 2021 at 3:40 pm | Reply
  44. LGXETnAmC

    UyRTNAMFIcj

    December 31, 2020 at 10:51 pm | Reply
  45. Cindy Arvin

    Write more, thats all I have to say. Literally, it seems as though you relied on the video to make your point. You clearly know what youre talking about, why throw away your intelligence on just posting videos to your site when you could be giving us something informative to read?

    https://extraproxies.com/how-to-accept-paypal-payments/

    December 26, 2020 at 4:35 pm | Reply
  46. make money fast

    Earn 100 commissions of up to 900+ dollars DAILY. 90 Second Set Up – Beta Tested Proven 24-7 AUTOPILOT Income – The Ultimate Work Safe At Home System More details: https://bit.ly/2YfQFcC

    https://bit.ly/2YfQFcC

    December 26, 2020 at 11:26 am | Reply
  47. Lakenya Corney

    Hmm is anyone else encountering problems with the pictures on this blog loading? I'm trying to determine if its a problem on my end or if it's the blog. Any suggestions would be greatly appreciated.

    https://extraproxies.com/100-mobile-hair-saloon-logo-truck-skin-7-days/

    December 21, 2020 at 6:27 am | Reply
  48. Augustus Bechard

    This can be a enormous plus a highly intriguing e-mail have a look at on this excellent weblog.

    http://6dollarmillion.xyz

    December 20, 2020 at 3:41 pm | Reply
  49. detectives privados boadilla del monte

    detectives privados las palmas

    https://www.argadetectives.com/detectives-fuengirola.html

    December 11, 2020 at 10:53 pm | Reply
1 2

Post a comment


 

CNN welcomes a lively and courteous discussion as long as you follow the Rules of Conduct set forth in our Terms of Service. Comments are not pre-screened before they post. You agree that anything you post may be used, along with your name and profile picture, in accordance with our Privacy Policy and the license you have granted pursuant to our Terms of Service.