Because of handling and performance issues Swiss had started a replacement programme in October 2023 which was expected to finish in the first quarter of 2025.

Key concerns include a seven-day delay in notifying international bodies of the incident as an "accident," despite the subsequent death of a crew member from oxygen deprivation, potentially linked to faulty breathing equipment (PBE).

[8] A criminal complaint, filed on behalf of ten passengers of a previous, unrelated Austrian Airlines flight that encountered severe hail, alleges a pattern of behavior from the SUB.

The masks were reportedly transported in an "unidentified garbage bag" by airport staff at the SUB investigator's request and left unattended, raising concerns about evidence preservation.

The Graz prosecutor's office is investigating potential charges of involuntary manslaughter and bodily harm related to the Swiss incident.