AD NUMBER: 2019-10-07

PRODUCT: Pilatus Aircraft Ltd. Models PC-6, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2, PC-6/B2-H2, PC-6/B2-H4, PC-6/C-H2, PC-6/C1-H2, PC-6-H1, and PC-6-H2 airplanes.

ACTION: Final Rule.

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

The MCAI describes the unsafe condition as sheared or missing rivets on the horizontal stabilizer hinge bracket assemblies.

DATES: This AD is effective July 10, 2019.

COST: The FAA estimates that this AD will affect 30 products of U.S. registry. Operators may incur the following costs in order to comply with this AD:

The FAA estimates that it will take about 9 work-hours per product to comply with the inspection and placard requirements of this AD. The average labor rate is $85 per work-hour. Required parts will cost about $200 per product.

Based on these figures, the FAA estimates the cost of the inspection and placard requirements on U.S. operators to be $28,950, or $965 per product.
In addition, the FAA estimates the following to do any necessary follow-on actions: Each rivet replacement will take 2 work-hours, fastener replacement will take 3 work-hours, one hinge bracket assembly replacement will take 9 work-hours, and two hinge bracket assembly replacements will take 15 work-hours.

The total estimated cost of parts will be $10,000. The FAA has no way of determining the number of products that may need replacement.

FMI: AD