AD NUMBER: 2019-10-05

PRODUCT: All Viking Air Limited (Viking) Models DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300, and DHC-6-400 airplanes.

ACTION: Final rule; request for comments.

SUMMARY: This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product.

The MCAI describes the unsafe condition as occurrences of excessive wear of elevator cables at pulley location station (STA) 270.3.

DATES: This AD is effective June 20, 2019. Comments must be received by July 15, 2019.

COST: The FAA estimates this AD will affect 133 products of U.S. registry.  Operators may incur the following costs in order to comply with this AD:

• It will take an estimated .5 work-hour per product to comply with the basic inspection requirement of this AD. The average labor rate is $85 per work-hour. Based on these figures, the estimated cost of the AD on U.S. operators to be $42.50 per product.
• In addition, the FAA estimates that any necessary follow-on replacement action will take about 3 work-hours and require parts costing $203 for a cost of $458 per product, but has no way of determining the number of products that may need these actions.

FMI: AD