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Thu, Dec 12, 2019

AD: The Boeing Company Airplanes

AD NUMBER: 2019-23-12

PRODUCT: All Boeing Model 737-300, -400, and -500 series airplanes.

ACTION: Final rule

SUMMARY: This AD was prompted by fuel system reviews conducted by the manufacturer.

This AD requires applying sealant to the fasteners in the fuel tanks, replacing wire bundle clamps external to the fuel tanks, and installing Teflon sleeving under the clamps.

DATES: This AD is effective January 13, 2020.

COST: The FAA estimates that this AD affects 268 airplanes of U.S. registry. Operators may incur the following costs in order to comply with this AD:

  • Apply sealant, replace clamps, install Teflon sleeving: Up to 516 work-hours × $85 per hour = $43,860.
  • Parts: Up to $200.
  • Cost per airplane: Up to $44,060.
FMI: AD

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