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AD: BRP-Rotax GmbH & Co KG Engine

AD NUMBER: 2019-10-04

PRODUCT: Certain BRP-Rotax GmbH & Co KG (Rotax) 912 and 914 model engines.

ACTION: Final Rule.

SUMMARY: This AD was prompted by power loss and engine revolutions per minute (RPM) drop on certain Rotax 912 and 914 model engines due to a quality control deficiency in the manufacturing process of certain valve push-rod assemblies resulting in partial wear on the rocker arm ball socket and possible malfunction of the valve.

This AD requires one-time inspection and, depending on the findings, replacement of the affected parts with parts eligible for installation.

DATES: This AD is effective July 10, 2019.

COST: The FAA estimates that this AD affects 150 engines installed on airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

  • Inspect the push-rod rocker arm ball sockets 1 work-hour × $85 per hour = $85

Replacement (if necessary):

  • Replace the valve push-rod assembly and rocker arm ball sockets 0.5 work-hours × $85 per hour = $42.50. Parts: $3,000, Cost per engine: $3,042.50
FMI: AD

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