an unspecified impact level
Cause code PNA021
Plain-language explanation, impact details and live examples.
Last updated 21 May 2026, 17:04:36TiB
Announcement phrasing
Train operators typically phrase this cause as:
TiB
Live trains referencing PNA021
Snapshot of services that mentioned this cause during the past 90 minutes and the next 3 hours.
Updated 21 May 2026, 17:04
We can't find any current trains referencing this cause.
Frequently asked questions about cause code PNA021
What does cause code PNA021 mean?
TiB
How serious is cause code PNA021?
It is classified as an unspecified impact level.
Which trains are currently affected?
See the live examples above. The list refreshes every minute.