Document ID: chunk:federal_register_of_legislation:F2011L01845:body:0:p3
Version: federal_register_of_legislation:F2011L01845
Segment Type: other
Provision Reference: 
Character Range: 7497–10459

pump.  Such arcing could result in an ignition source in the fuel tank.  The fuel pump failures have been attributed to the manufacturing assembly process during which the stator lead wire bundle was improperly installed and positioned in the end cap.
                The original issue of this Directive superseded AD/B737/190 Amdt 1, which was cancelled.  The Directive required an amendment to the AFM which is intended to ensure that the centre tank pump inlets are covered with fuel during pump operation, preventing fuel vapours from coming into contact with any ignition source resulting from a fuel pump failure and installation of a placard adjacent to both PFDs advising that fuel usage restrictions apply.  The Directive also provided optional terminating action for Requirements 1.b. and c.
                This Amendment limits the applicability of the fuel usage restrictions to aeroplanes before line number 1234, whilst at the same time retaining the requirement to ensure that fuel pumps that have not been inspected are not installed on aeroplanes as replacement spares.
                Amendment 2 allows alternate wording for the placard detailed in Requirement 1 (c).  This is to allow easier cross referencing to FAA AD 2011-18-03 which details alternative terminating actions for the requirements of this AD.

                Alternative Methods of Compliance for AD 2002-19-52 that are approved by the FAA are acceptable as a means of compliance against this AD.

                The original issue of this Directive became effective on 3 October 2002.

                Amendment 1 of this Directive became effective on 23 June 2005.

Mike Higgins
Delegate of the Civil Aviation Safety Authority

5 September 2011
AD/B737/198 Amdt 2  Centre Tank Fuel Pumps  18/2011
Annex A

  Model 737-600, -700, -700C, -800 and -900
  Series Aeroplanes
  Aircraft Flight Manual Revision

Certificate Limitations

The centre tank fuel pumps must be OFF for takeoff if centre tank fuel is less than 5,000 pounds (2,300 kilograms) with the airplane readied for initial taxi.

Both centre tank fuel pump switches must be selected OFF when centre tank fuel quantity reaches approximately 1,000 pounds (500 kilograms) during climb and cruise or 3,000 pounds (1,400 kilograms) during descent and landing.  The fuel pumps must be positioned OFF at the first indication of fuel pump low pressure.

The CWT fuel quantity indication system must be operative to dispatch with CWT mission fuel.

     Note: The CONFIG indicator will annunciate when centre tank fuel exceeds 1,600 pounds (800 kilograms) and the centre tank fuel pump switches are OFF.  Do not accomplish the CONFIG non-normal procedure prior to or during takeoff with less than 5,000 pounds (2,300 kilograms) of centre tank fuel or during descent and landing with less than 3,000 pounds (1,400 kilograms) of centre tank fuel.

     Note: In a low fuel situation, both centre tank pumps