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Thu, Oct 31, 2019

AD: The Boeing Company Airplanes

AD NUMBER: 2019-19-02

PRODUCT: Certain The Boeing Company Model 747-400 and 747-400F series airplanes.

ACTION: Final rule

SUMMARY: This AD was prompted by an evaluation that determined fatigue cracks could develop in the underwing longerons.

This AD requires repetitive inspections of the underwing longerons and certain fuselage skins for any crack, and applicable on-condition actions.

DATES: This AD is effective November 27, 2019

COST: The FAA estimates that this AD affects 20 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

  • Detailed inspections of the underwing longerons: Labor: 2 work-hours × $85 per hour = $170 per inspection cycle per airplane.
  • Ultrasonic and HFEC inspections of the adjacent fuselage skin: Labor: 9 work-hours × $85 per hour = $765 per inspection cycle per airplane.
  • Ultrasonic inspections of the underwing longerons: Labor: 2 work-hours × $85 per hour = $170 per inspection cycle per airplane.
FMI: AD

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