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Wed, Oct 17, 2007

AD: Boeing

AD NUMBER: 2007-21-13
MANUFACTURER: Boeing
SUBJECT: Airworthiness Directive 2007-21-13
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747 and 767 airplanes.

This AD requires reworking the electrical bonding between the airplane structure and the pump housing of the outboard boost pumps in the main fuel tank of certain Boeing Model 747 airplanes, and between the airplane structure and the pump housing of the override/jettison pumps in the left and right wing center auxiliary fuel tanks of certain Boeing model 767 airplanes.

This AD also requires related investigative actions and corrective actions if necessary.

This AD results from fuel system reviews conducted by the manufacturer.

We are issuing this AD toprevent insufficient electrical bonding, which could result in a potential of ignition sources insidethe fuel tanks, and which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

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

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