from the AD:

"(g) Inspection
Within 10 hours time-in-service (TIS) after the effective date of this AD, perform a visual inspection of the stabilizer actuator to confirm that the stabilizer actuator lock ring is present, correctly seated in the groove in the upper housing, and engaged in the clamp nut. If the stabilizer actuator lock ring is missing or not correctly installed, before further flight, repair using a method approved by the Manager, New York ACO Branch, FAA, at the address in paragraph (k) of this AD.

Note to paragraph (g): Viking Service Letter DHC3-SL-27-001, dated October 25, 2022, contains information related to this AD"

also:

"Costs of Compliance
The FAA estimates that this AD affects 63 airplanes of U.S. registry.

The FAA estimates the following costs to comply with this AD:

Estimated Costs

Action Labor cost Parts cost Cost per product Cost on U.S. operators
Inspection and Torque Seal Application 1 work-hour × $85 per hour = $85 Not Applicable $85 $5,355
Reporting Requirement 1 work-hour × $85 per hour = $85 Not Applicable 85 5,355
The FAA has received no definitive data regarding the cost estimates for the on-condition corrective actions required by this AD."