Thread | Brutkey

Here are the "release notes" for Airbus ELAC B L104 standard/software.

There is very little info in documents or media on -
- which change caused this issue
- how Airbus determined that the issue is caused by data corruption as opposed to a software bug
- how data corruption caused by radiation is detected and handled
- is computer hardware radiation-hardened and shielded?
- is hardware/software tested in radiation chambers?
- ...

https://d10x.airbus.com/wp-content/uploads/2024/02/A320-Family-Digest-of-available-enhancements-2024-Digital.pdf
3/n

Screenshot of a page of the A320 enhancements document -

Within Safety Beyond Standard initiative, ELAC B L104 standard is developed
to reduce the threat of Loss of Control In-flight, by enhancing the flight envelope
protections availability.
The ELAC B L104 standard introduces the following main SBS functions:
- Addition of the Pitch Attitude Limitation in Alternate Law (PALAL) for all CEO/NEO,
except A318: pitch positive angle limitation is available in alternate law, in clean
configuration with settings function of altitude. Stall potential situation is thus delayed in
case of inappropriate pitch-up inputs;
- Flight envelope protections kept in case of system failures: in case of dual loss of yaw
damper or dual loss of Flight Augmentation Computer (FAC), flight envelope protections
are kept available, ALTN LAW is still displayed on Electronic Centralized Aircraft
Monitoring (ECAM) as protections efficiency is reduced.

Michael / Chgowiz 🎲

🎲

@chgowiz@dice.camp

@AkaSci@fosstodon.org I wonder if some tech over at Airbus has been reading BOFH stories and got themselves an excuse calendar...