- Controller: Any type can be applicable
- Firmware Version: Any version pre-LSIP200662533 (not yet fixed) is applicable
- This issue is fixed in CFW 8.20.20.xx+ and 8.25.07.xx+.
Discrete line diagnostic failure event observed in the MEL.
The MEL event 'Discrete lines diagnostic failure' is reported against both controllers, and is then resolved on both within 13 seconds.