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Tue, Feb 20, 2007

AD: Boeing

AD NUMBER: 2007-04-16
MANUFACTURER: Boeing
SUBJECT: Airworthiness Directive 2007-04-16
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all Boeing Model 767 airplanes. This AD requires an inspection of each main tank fuel boost pump for the presence of a pump shaft flame arrestor, and if the flame arrestor is missing, replacement of that pump with a pump having a pump shaft flame arrestor. This AD also requires repetitive measurements of the flame arrestor's position in the pump, and corrective actions if necessary. This AD also requires the replacement of the pump with a new or modified pump, which ends the repetitive measurements.This AD results from reports that certain fuel boost pumps may not have flame arrestors installed in the pump shaft and reports that the pin that holds the flame arrestor in place can break due to metal fatigue. We are issuing this AD to prevent the possible migration of a flame from a main tank fuel boost pump inlet to the vapor space of that fuel tank, and consequent ignition of fuel vapors, which could result in a fire or explosion.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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