AAIB investigation to Let L-410 UVP-E, OK-LAZ

Aircraft landed with crosswind component of 40 kt (maximum demonstrated crosswind component is 19.4 kt), Isle of Man (Ronaldsway) Airport, 23 February 2017.

Summary:

The aircraft departed Isle of Man (Ronaldsway) Airport (IOM) on a commercial flight to Belfast City Airport (BHD), in a region affected by a deep low pressure system with associated strong surface winds. After one unsuccessful attempt to land at BHD in a strong crosswind, the crew diverted back to IOM.

When the aircraft landed at IOM the wind was gusting to 63 kt and creating a maximum crosswind component of 40 kt. After touchdown, nearby witnesses saw the right mainwheel lift off the ground and they estimated the left wingtip rolled to within approximately one metre of the runway surface before the landing was successfully completed.

The relevant maximum demonstrated crosswind component for the Let L-410 was 19.4 kt and this was included in the ‘Performance Limitations’ section of the Airplane Flight Manual (AFM) but the aircraft operator did not apply a limiting component of crosswind to its operations. The only wind limit that was applied and used by the crew was 45 kt for ground operation.

Several safety actions have been taken including amendments to the aircraft operator’s Operations Manual regarding crosswind operations.

One Safety Recommendation has been made to review the aircraft operator’s operational processes, training and operator’s guidance.

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Let L-410 UVP-E, OK-LAZ 03-18

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Glossary of abbreviations

Published 8 March 2018