COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 737 Series Aeroplanes AD/B737/47 Left Engine Fuel Feed Tube 11/90 Applicability: Model 737-300 and 737-400 series, listed in Boeing Service Bulletin 737-28-1084. Requirement: Unless already accomplished, action one of the following: 1. Inspect the left engine fuel feed tube assembly for proper clearance and chafing in accordance with Boeing Service Bulletin 737-28-1055 Revision 1. 2. Replace the left engine fuel feed tube assembly in accordance with Boeing Service Bulletin 737-28-1084, and verify minimum clearance between support structure and fuel tube in accordance with Boeing Service Bulletin 737-28-1055 Revision 1. 3. Replace the left engine fuel feed tube assembly in accordance with Boeing Service Bulletin 737-28-1084, and verify minimum clearance in accordance with Boeing Service Bulletin 737-28-1084 Revision 1. Note: FAA AD 90-15-03 Amdt 39-6650 refers. Compliance: 1. Prior to 31 January 1991. 2. Prior to 30 April 1991. 3. Prior to 30 April 1991. Background: Reports of chafing of the left engine fuel feed tube in the wing/strut area have been received by the FAA. This condition could result in fuel leakage causing a potential engine strut fire hazard.