Glitches found in F-35 software that would cause systems to reboot have now been fixed.

IHS Jane’s reported earlier in the year that an issue arose in late 2015 with the F-35’s AN/APG-81 active electronically scanned array (AESA) radar system, built by Northrop Grumman. The software planned to be used in the F-35A when the US Air Force declares its “initial operational capability” had a major flaw.

Air Force F-35 Integration Office Director Major General Jeffrey Harrigian told Jane’s the flaw relates to:

“radar stability—the radar’s ability to stay up and running. What would happen is they’d get a signal that says either a radar degrade or a radar fail—something that would force us to restart the radar.”

The problem is believed to lie with software Block 3i, the jets’ systems would shut down about once every three or four hours and have to be rebooted. This effect is reportedly caused by a timing misalignment of the software of the sensors and the software in the F-35’s main computer cores.

F-35 PEO Air Force Lt. Gen. Christopher Bogdan told US lawmakers:

“We’ve seen stability problems with our block 3i software, however we believe we’ve identified the root cause of these problems and tested solutions in lab and in flight test and are now completing our flight test with these solutions, our initial indications of these flight testing are positive and we’ve see software stability improve to two to three times better than what we’ve seen in the past. By the end of this month I am encouraged that we will have enough data to consider this problem and issue closed.”

The Joint Program Office and F-35 manufacturer Lockheed Martin identified the root cause, incorporated a fix, and have nearly finished flight tests of the updated software, JPO chief Lt. Gen. Christopher Bogdan told reporters on Tuesday.

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David L Thomas
5 years ago

This is one hell of a plane – hope to see it at RIAT this year and I can turn up…

Martin Weston
5 years ago

Awesome! World class 5th generation planes all ready for our coming super carriers the only ones purpose built on the planet to take these new beasts!

Andrew Casson
5 years ago

All we need now is some cash to buy them

Christopher Kent
5 years ago
Reply to  Andrew Casson

Easy cuts welfare benefits to all the bums

Kevin Oates
5 years ago

Fundamental airframe glitches remain however…

David Hume
5 years ago

The entire design philosophy employed with this aircraft is fundamentally flawed. The juxtaposition of ground attack and fighter aircraft mean it can never fully perform either role as well as an aircraft built for a sole function.

Ali Ben-Mussa
5 years ago

Windows blue screen of death? 😉

Tim Swinburn
5 years ago

Hmm, digital = glitch. Analogue = loads of tired but happy, employed engineers ha ha

Vincent Tanner
5 years ago

we don’t want this 🙂

John Buckley
5 years ago

Big mistake having to buy from every other country. One lover’s tiff and there goes your replen when the shit starts flying for more than a month or two. I’m sure the Harrier could have been updated and it worked. In fact, it was so ” out dated” that the yank marine corps snapped them up. No one learns from history, ever.

Mick Lowe
5 years ago

They better be good we probably can only afford a squadron.