Document ID: chunk:federal_register_of_legislation:F2006B02706:body:0:p2
Version: federal_register_of_legislation:F2006B02706
Segment Type: other
Provision Reference: 
Character Range: 2777–4401

Directive becomes effective on 31 October 2002.

 Boeing 727 Series Aeroplanes

 AD/B727/181 (continued)

           Background: The United States Federal Aviation Administration (FAA) received a report that, during a check shortly after the landing of a Boeing Model 727-200F series aeroplane, a crew member on board the aeroplane saw smoke in the left aft stairwell area.
           Evidence of overheating (molten aluminium) and fire damage was found between body stations 1203 and 1223. Additional evidence of overheating was also found on the upper and lower torque boxes outboard and above the standby hydraulic reservoir.

           Investigation revealed the fire was caused by an electrical wire bundle chafing and subsequently arcing against a hydraulic system "A" case drain return line tube. The wire bundle provides electrical power to the standby hydraulic pump. A hole was burned in the aft side of the tube and in the back of a bend on a hydraulic reservoir pressurization tube located four feet above the drain return line tube. Such discrepancies of the wire bundle, if not found and fixed, could result in electrical arcing between the wiring and hydraulic tubing, and consequent fire and damage to adjacent structure.

           This Directive requires a one-time inspection to detect discrepancies of the wire bundles and hydraulic tubing in the aft stairwell area, together with any necessary. corrective action.

 James Coyne
 Delegate of the Civil Aviation Safety Authority 13 September 2002

 The above AD is notified in the Commonwealth of Australia Gazette on 9 October 2002.