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UK Civil Aviation Regulations

These are published by the CAA on our UK Regulations pages. EU Regulations and EASA Access Guides published by EASA no longer apply in the UK. Our website and publications are being reviewed to update all references. Any references to EU law and EASA Access guides should be disregarded and where applicable the equivalent UK versions referred to instead.

Trim runaway was a possible scenario identified by the Air Accidents Investigation Branch in a report into a 2017 Piper PA-31 fatal accident.

The pilot reported pitch control problems and diverted to Caernarfon Airport where the aircraft crashed on an attempted landing. The elevator trim was found in a significantly nose-down position.

You can read the full AAIB report in the AAIB March 2019 bulletin.

To help pilots prepare for a trim runaway we have produced a short guidance document called Handling a trim runaway (CAP 1774).

The short videos below explain the issue, how to deal with a runaway and what you can do now to make sure you're prepared for any incident.