AAIB investigation to DHC-1 Chipmunk 22, G-BXHA

Severe vibration due to cracked propeller assembly, Sevenoaks, Kent, 22 March 2022.

• From: Air Accidents Investigation Branch
• Published: 9 February 2023

• Category: General aviation - fixed wing
• Report type: Bulletin - Correspondence investigation
• Date of occurrence: 22 March 2022
• Aircraft type: DHC-1 Chipmunk 22
• Location: Sevenoaks, Kent
• Registration: G-BXHA

Summary:

During the flight the aircraft developed severe vibration requiring the pilot to return to the airfield where fatigue cracks were found in the propeller and its two mounting blocks. The cracks originated from fretting between the propeller assembly and splines on the engine hub.

The aircraft’s Type Responsibility Agreement holder, CAA and LAA are taking combined safety action to promulgate enhanced guidance for continued airworthiness of Fairey Reed propellers. This action is in addition to existing inspection and maintenance requirements to owners of aircraft using this propeller type.

Download report:

DHC-1 Chipmunk 22, G-BXHA 02-23

Download glossary of abbreviations:

Glossary of abbreviations

Published 9 February 2023