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AD: Leonardo S.p.A. Helicopters

AD NUMBER: 2018-16-08

PRODUCT: Leonardo S.p.A. (Leonardo) Model A109E, A109S, and AW109SP helicopters with an oil cooler fan assembly (fan assembly) installed.

ACTION: Final Rule, request for comments.

SUMMARY: This AD requires inspecting each oil cooler system pulley assembly (pulley assembly) bearing and replacing each fan assembly.

This AD is prompted by reports of degraded pulley assembly bearings.

DATES: This AD becomes effective August 20, 2018. Comments on this AD must be received by October 2, 2018.

COST: The FAA estimates that this AD affects 127 helicopters of U.S. Registry. Operators may incur the following costs in order to comply with this AD:

At an average labor rate of $85 per work-hour, inspecting the bearings will require 1 hour, for a cost per helicopter of $85. Replacing both fan assemblies will require 8 hours and $44,800 for parts. Based on these figures, the FAA estimates a total cost of $45,565 per helicopter.

According to the Leonardo service information, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals.

FMI: AD

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