Airworthiness Directive · Amendment 39-13883 · Boeing Model 737-600, -700, -700C, -800, and -900 Series Airplanes
Boeing Model 737-600, -700, -700C, -800, and -900 Series Airplanes
This AD applies to Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes, as listed in Boeing Special Attention Service Bulletin 737-28-1190, Revision 1, dated March 27, 2003; certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 737-600, -700, -700C, -800, and -900 series airplanes. This AD requires replacing the bracket for the wire bundle of the fuel quantity indicating system (FQIS), performing a general visual inspection of the FQIS wire bundle for damage, and doing corrective actions if necessary. This AD is prompted by a report of an incorrectly installed FQIS wire bundle. We are issuing this AD to prevent chafing of the FQIS wire(s) in the center fuel tank, which, when combined with a lightning strike or a power wire short to the FQIS wire(s), could result in arcing in the center fuel tank and consequent fuel tank explosion.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 24 months after the effective date of this AD, replace the bracket for the FQIS wire bundle with a new, improved bracket, perform a general visual inspection of the FQIS wire bundle for damage, and perform any applicable corrective actions, by accomplishing all of the actions specified in the Accomplishment Instructions of Boeing Special Attention Service Bulletin 737-28-1190, Revision 1, dated March 27, 2003. Do any applicable corrective actions before further flight.
Note 1: For the purposes of this AD, a general visual inspection is defined as: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to enhance visual access to all exposed surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”
Actions accomplished before the effective date of this AD in accordance with Boeing Special Attention Service Bulletin 737-28-1190, dated January 16, 2003, are considered acceptable for compliance with the corresponding action specified in this AD.
As of the effective date of this AD, no person may install a bracket, part number 287A9111-3, for the FQIS wire bundle, on any airplane.
