AD NUMBER: 2019-05-12

PRODUCT: Certain Bombardier, Inc., Model CL-600-2C10 (Regional Jet Series 700, 701 & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, Model CL-600-2D24 (Regional Jet Series 900) airplanes, and Model CL600-2E25 (Regional Jet Series 1000) airplanes.

ACTION: Final Rule.

SUMMARY: This AD was prompted by reports of a fractured main landing gear (MLG) orifice support tube (OST).

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

DATES: This AD is effective May 3, 2019.

COST: The FAA estimates that this AD affects 542 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

• Replacement (left- and right-hand sides) 24 work-hours × $85 per hour = $2,040 per aircraft.

The FAA has received no definitive data that would enable us to provide cost estimates for the parts cost in this AD.

FMI: AD