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Wed, Apr 23, 2008

AD: Boeing

AD NUMBER: 2008-08-22
MANUFACTURER: Boeing
SUBJECT: Airworthiness Directive 2008-08-22
SUMMARY
: We are adopting a new airworthiness directive (AD) for certain Boeing Model 737-600, -700,-700C, -800, and -900 series airplanes.

This AD requires a one-time inspection to determine the material of the forward and aft gray water drain masts. For airplanes having composite gray waterdrain masts, this AD requires installation of a bonding jumper between a ground and the clamp on the tube of the forward and aft gray water composite drain masts.

This AD results from a report of charred insulation blankets and burned wires around the forward gray water composite drain mast found during an inspection of the forward cargo compartment on a Model 767-300F airplane.

We are issuing this AD to prevent a fire near a composite drain mast and possible disruption of the electrical power system caused by a lightning strike on a composite drain mast,which could result in the loss of several functions essential for safe flight.

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

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