Document ID: chunk:federal_register_of_legislation:F2006B02853:body:0:p1
Version: federal_register_of_legislation:F2006B02853
Segment Type: other
Provision Reference: 
Character Range: 4–2948

Boeing 737 Series Aeroplanes

AIRWORTHINESS DIRECTIVE

    For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

    AD/B737/150 Fuel Quantity Indicating System - No. 2
                             Tank Wiring Harness

    Applicability: All Model 737-300, -400 and -500 series aeroplanes.

4/2001

                 Requirement: 1. Except as provided by Requirement 6 of this Directive, perform a one-time detailed visual inspection of the Fuel Quantity Indication System (FQIS) wiring and fuel tubing on the inboard side of the right wing rib wing buttock line (WBL) 227 and on the aft side of stringer No 13 to determine if clearance of 9.5mm (3/8 inch) or greater exists between the FQIS wire harness and the refuel tube and tube coupling, and to detect any loose or broken refuel tube clamp or bracket, or chafing of the FQIS wire harness, in accordance with Boeing Alert Service Bulletin (ASB) 737-28A1168, Revision 1, dated 11 January 2001.

               Note 1: For the purposes of this Directive, a detailed visual inspection is defined as: "An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required."

                 2.    If, during the Requirement 1 inspection, the clearance between the FQIS wire harness and the refuel tube is found to be less than 9.5mm (3/8 inch) readjust the refuel tube and relocate the bonding jumper or, if necessary, lockwire away from the wiring in accordance with the ASB.

                 3.    If, during the Requirement 1 inspection, any loose or broken refuel tube clamp or bracket is found, replace the broken clamp with a new clamp; repair the broken bracket or replace the broken bracket with a new bracket; and secure the loose clamp or bracket; as applicable; in accordance with the ASB.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

4.    If any chafing of the FQIS wiring harness is found, replace the wire harness with a new wire harness or