# Troubled F-35 Fighter Jet Sees Delays on Lack of Spare Engines | Tech News (HT Tech) > Engine shortages are holding down the readiness rates of the F-35, the world’s costliest weapons program, according to congressional auditors. # Troubled F-35 Fighter Jet Sees Delays on Lack of Spare Engines ## Engine shortages are holding down the readiness rates of the F-35, the world’s costliest weapons program, according to congressional auditors. Aug 22 2022, 11:54 IST ![Follow on Facebook](https://images.hindustantimes.com/tech/static/revamp/images/png/follow-us-facebook.png) ![Follow on Facebook](https://images.hindustantimes.com/tech/static/revamp/images/png/follow-us-facebook-hover.png) ![Share](https://images.hindustantimes.com/tech/static/revamp/images/png/Share.png) ![Share](https://images.hindustantimes.com/tech/static/revamp/images/png/Shareclicked.png) ![Share on WhatsApp](https://images.hindustantimes.com/tech/static/revamp/images/png/whatsapp.png) ![Share on WhatsApp](https://images.hindustantimes.com/tech/static/revamp/images/png/whatsapp-hover.png) ![Share on Twitter](https://images.hindustantimes.com/tech/static/revamp/images/png/twitter.png) ![Share on Twitter](https://images.hindustantimes.com/tech/static/revamp/images/png/twitter-hover.png) ![Share on Facebook](https://images.hindustantimes.com/tech/static/revamp/images/png/facebook.png) ![Share on Facebook](https://images.hindustantimes.com/tech/static/revamp/images/png/facebook-hover.png) ![Bookmark](https://images.hindustantimes.com/tech/static/revamp/images/png/Bookmark.png) ![Bookmarked](https://images.hindustantimes.com/tech/static/revamp/images/png/Bookmarked.png) ![F-35 Jet](https://images.hindustantimes.com/tech/img/2022/04/29/1600x900/download_(1)_1651224613062_1651224639273.jpg) F-35 engine shortage is hitting hardest at the version used by the Air Force, which has the biggest fleet of F-35s. (REUTERS) ![Author Photo](https://images.hindustantimes.com/tech/static/revamp/images/png/HTTech-new-circle-logo.png) ### By BLOOMBERG Engine shortages are holding down the readiness rates of the F-35, the world’s costliest weapons program, according to congressional auditors. Since the beginning of 2020, an increasing number of the fighter jets “have not been able to fly due to the lack of an operating engine,” the U.S. Government Accountability Office said in prepared testimony Thursday for a House Armed Services subcommittee. The problem is hitting hardest at the version used by the Air Force, which has the biggest fleet of F-35s. The engines built by Raytheon Technologies Corp.’s Pratt & Whitney unit aren’t breaking down more often than planned, but fixing or replacing them when they do fail is taking longer than expected. That’s partly because breakdowns often involve the power module, which requires time-consuming work, and the GAO said the Pentagon hasn’t created enough depot maintenance capacity even as the number of F-35s has increased. Expressing frustration with the F-35 engine, Representative John Garamendi, the subcommittee’s chairman, said he will call Pratt & Whitney representatives to testify. “Watch out, I’m coming after you,” the California Democrat said. Also read click here. The GAO assessed that F-35 readiness rates for the Air Force, Navy and Marine Corps have improved since 2019 but still fall short of program goals. The aircraft could fly and perform all its assigned missions 39% of the time in 2020 before slipping to 38% in fiscal 2021. That’s far short of goals of 72% for the Air Force and 75% for the Navy and Marine models. Defense Department officials said “they recognized that they have not had adequate depot capacity to repair the power module and do not have sufficient capacity to meet the demand of future unscheduled and scheduled engine repairs,” the GAO said. The engine repair issue, and its ramifications for readiness, are a case study in why the Pentagon is having trouble reducing an estimated $1.3 trillion cost to operate and sustain the planes built by Lockheed Martin Corp. over a 66-year projected lifespan. That’s separate from troubles in the $398 billion program to develop and build the fighter. So far, 788 of the planes have been delivered to the U.S. military and customers abroad. Catch all the Latest Tech News, Mobile News, Laptop News, Gaming news, Wearables News , How To News, also keep up with us on Whatsapp channel,Twitter, Facebook, Google News, and Instagram. For our latest videos, subscribe to our YouTube channel. 29 Apr, 23:36 IST united states ![HT Tech Awards](https://tech.hindustantimes.com/ht-tech-power-list-awards-2026/httech-awards-banner-new.webp) ### Related Stories 07 Oct 2026 71,651,217,113,655 NEXT ARTICLE BEGINS ![View all](https://images.hindustantimes.com/tech/static/revamp/images/png/view-all-icon.png) ## Tips & Tricks ![Ghibli-style art](https://images.hindustantimes.com/tech/img/2025/03/28/414x233/ChatGPT_Ghibli_style_images_1743161814450_1743161814596.jpg) ### How to turn your photos into Ghibli-style art with ChatGPT for free: Step-by-step guide ![How to create an invitation using iPhone’s new Apple Invites app- Step-by-step guide](https://images.hindustantimes.com/tech/img/2025/02/14/414x233/invites_1738728829564_1739543695649.png) ### How to create an invitation using iPhone’s new Apple Invites app- Step-by-step guide ![Apple TV app arrives on Android phones and tablets: What you get and how to install it](https://images.hindustantimes.com/tech/img/2025/02/13/414x233/unnamed_1739426557335_1739426567634.jpg) ### Apple TV app arrives on Android phones and tablets: What you get and how to install it ![Vodafone Idea OTT plans](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Vodafone Idea users can now stream 17 OTT apps with one subscription: Here's how ![Android data transfer methods](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### How to transfer data from one Android to another using Google backup, USB-C cable, and more ## Editor’s Pick ![iPhone 16e launched with A18 chip, Apple AI—bringing flagship power on a budget: Check specs, price](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### iPhone 16e launched in India: All details about the new budget mobile from Apple ![DeepSeek was founded in China with only a fraction of the budget of the top AI companies in the US.](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### DeepSeek AI: How it works, who’s behind it, how it’s different from ChatGPT, and its big US market impact explained ![iPhone 17 Air likely to get this feature that iPhone 17 Pro models may miss out on](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### iPhone 17 Air likely to get this feature that iPhone 17 Pro models may miss out on ![Google Whisk AI explained: How remixing works, availability, and how it differs from Gemini](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Google Whisk AI explained: How remixing works, availability, and how it differs from Gemini ![iOS 18.4 beta arriving soon: Know why it is the biggest iPhone update](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### iOS 18.4 beta arriving soon: Know why it is the biggest iPhone update ## Trending Stories ![Airtel 5G SIM card will now be delivered in 10 minutes with Blinkit- How to order](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Airtel 5G SIM card will now be delivered in 10 minutes with Blinkit- How to order ![Infinix Note 50s 5G+](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Infinix Note 50s 5G+ set to launch in India with 64MP camera and MediaTek Dimensity 7300 SoC ![Xiaomi X Pro QLED Series sale starts in India: Check price, availability, and more](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Xiaomi X Pro QLED Series sale starts in India: Check price, availability, and more ![Apple Intelligence AI training](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Apple plans to train AI using your on-device data without accessing personal content or emails: Report ![CMF Buds 2](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### CMF Buds 2 key features and price revealed ahead of April 28 launch: Details inside keep up with tech ![Facebook](https://images.hindustantimes.com/tech/static/revamp/images/png/tech-facebook.png) ![Twitter](https://images.hindustantimes.com/tech/static/revamp/images/png/tech-twitter.png) ![WhatsApp](https://images.hindustantimes.com/tech/static/revamp/images/png/tech-whatsApp.png) ![Facebook](https://images.hindustantimes.com/tech/static/revamp/images/png/tech-facebook.png) ## Gaming ![Check out these five gaming monitors under ₹20,000,](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Top 5 gaming monitors under ₹20000 you should consider ![gaming consoles](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Grab gaming consoles at discounted rates during Amazon Great Indian Festival: Up to 72% off ![Pokémon GO Wild Area 2025](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Pokémon GO Wild Area 2025 to bring Grimmsnarl family, Shiny Hatenna, and global challenges ![Shade Silver](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Shade Silver free on Steam for a limited time: Here’s how to get it ![Call of duty](https://images.hindustantimes.com/tech/static/revamp/images/png/ht-tech-bg-img-90-66.png) ### Call of Duty: Black Ops 7 skips Switch 2 at launch, release date and price leak ![View all](https://images.hindustantimes.com/tech/static/revamp/images/png/view-all-icon.png) ## Trending News ### Airtel 5G SIM card will now be delivered in 10 minutes with Blinkit- How to order ![Airtel 5G SIM card will now be delivered in 10 minutes with Blinkit- How to order](https://images.livemint.com/static/static/1x1_img.gif) ### Infinix Note 50s 5G+ set to launch in India with 64MP camera and MediaTek Dimensity 7300 SoC ![Infinix Note 50s 5G+](https://images.livemint.com/static/static/1x1_img.gif) ### Xiaomi X Pro QLED Series sale starts in India: Check price, availability, and more ![Xiaomi X Pro QLED Series sale starts in India: Check price, availability, and more](https://images.livemint.com/static/static/1x1_img.gif) ### Apple plans to train AI using your on-device data without accessing personal content or emails: Report ![Apple Intelligence AI training](https://images.livemint.com/static/static/1x1_img.gif) ### CMF Buds 2 key features and price revealed ahead of April 28 launch: Details inside ![CMF Buds 2](https://images.livemint.com/static/static/1x1_img.gif) ## Trending Gadgets Mobiles Laptops Tablets ![HT Tech](https://images.hindustantimes.com/tech/static/revamp/images/png/HT_tech-new.gif) - https://tech.hindustantimes.com/tech/news/troubled-f-35-fighter-jet-sees-delays-on-lack-of-spare-engines-71651217113655.html