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Thu, Jun 07, 2018

AD: The Boeing Company Airplanes

AD NUMBER: 2018-11-13

PRODUCT: Certain Boeing Model 787-8 airplanes.

ACTION: Final Rule.

SUMMARY: This AD was prompted by a report of possible degraded bond-line performance of co-bonded upper wing stringer-to-skin joints.

This AD requires repetitive inspections of certain upper wing stringers for any disbond and corrective actions, if necessary; and a terminating preventive modification of installing disbond arrestment (DBA) fasteners.

This AD also requires revising the inspection or maintenance program to incorporate an airworthiness limitation.

DATES: This AD is effective July 10, 2018.

COST: The FAA estimates that this AD affects 24 airplanes of U.S. registry. The costs of compliance are estimated as follows:

  • Inspection - $4,165 per aircraft per inspection cycle for 49 hours labor.
  • Modification - Up to $31,822 per aircraft for parts and up to 352 hours labor.
  • Maintenance or Inspection Program Revision - $85 per aircraft for one hour labor.
FMI: AD

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