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Fri, Feb 22, 2008

AD: Boeing

AD NUMBER: 2008-04-11
MANUFACTURER: Boeing
SUBJECT: AIRWORTHINESS DIRECTIVE 2008-04-11
SUMMARY:
 The FAA is adopting a new airworthiness directive (AD) for all Boeing Model 707 airplanes, and Model 720 and 720B series airplanes. This AD requires revising the FAA-approved maintenance program by incorporating new airworthiness limitations (AWLs) for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. This AD also requires theinitial performance of certain repetitive AWL inspections to phase in those inspections, and repairif necessary. This AD results from a design review of the fuel tank systems. We are issuing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures,alterations, repairs, or maintenance actions, 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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