The PDF isn't long and is worth a read if you're interested in learning from other peoples mistakes. Of note is that the issue was known and there was a manual workaround that was not used for that flight because the team doing it didn't work on a weekend.
Reading the document it looks like the manual workaround was then implemented into software. This hack just masks the underlying problem rather than providing a robust solution.
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Official report and link to PDF here: https://www.gov.uk/aaib-reports/aaib-investigation-to-boeing...
The PDF isn't long and is worth a read if you're interested in learning from other peoples mistakes. Of note is that the issue was known and there was a manual workaround that was not used for that flight because the team doing it didn't work on a weekend.
Reading the document it looks like the manual workaround was then implemented into software. This hack just masks the underlying problem rather than providing a robust solution.
Link seems to be dead, but doc is available here: https://assets.publishing.service.gov.uk/media/604f423be90e0...