AD NUMBER: 2019-23-05

PRODUCT: Dassault Aviation Model MYSTERE-FALCON 900 airplanes.

ACTION: Final rule

SUMMARY: The FAA is superseding Airworthiness Directives (ADs) 2016-01-16, 2017-19-03, and 2018-19-05, which applied to Dassault Aviation Model MYSTERE-FALCON 900 airplanes.

Those ADs require revising the maintenance or inspection program, as applicable, to incorporate new or more restrictive maintenance requirements and/or airworthiness limitations.

This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations.

Since AD 2018-19-05 was issued, the FAA has determined that new or more restrictive airworthiness limitations are necessary.

DATES: This AD is effective January 13, 2020.

COST: The FAA estimates that this AD affects 134 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

The FAA estimates the total cost per operator for the retained actions from AD 2018-19-05 to be $7,650 (90 work-hours x $85 per work-hour).

The FAA has determined that revising the existing maintenance or inspection program takes an average of 90 work-hours per operator, although this number may vary from operator to operator. In the past, the FAA has estimated that this action takes 1 work-hour per airplane.

Since operators incorporate maintenance or inspection program changes for their affected fleet(s), the FAA has determined that a per-operator estimate is more accurate than a per-airplane estimate. The FAA estimates the total cost per operator for the new actions to be $7,650 (90 work-hours x $85 per work-hour).

FMI: AD