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.
Boeing 767 Series Aeroplanes
AD/B767/155 P37 Panel - Electrical Wire Bundle
Inspection and Protection
11/2001
DM
Applicability: All Model 767 series aeroplanes.
Requirement: 1. Perform the following actions in accordance with Boeing Alert Service Bulletin (ASB) 767-24A0134 (for Model 767-200 and -300 series aeroplanes) and 767- 24A0135 (for Model 767-400ER series aeroplanes), both dated 15 March 2001:
- Perform a one-time detailed visual inspection of the wire bundles located below the P37 panel to detect abrasion damage and wire installation discrepancies (including missing standoffs; missing, chafed, or loose cable clamps; chafed grommets; and wire bundles located beneath an insulation blanket).
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.”
b. Relocate the wire support standoff.
c. Install protective sleeving over the wire bundles.
2. If any damage or other discrepancy is found during the Requirement 1.a. inspection, perform corrective action in accordance with the applicable ASB.
Note 2: FAA AD 2001-17-28 Amdt 39-12419 refers.
Compliance: For Requirement 1 - Within 90 days after the effective date of this Directive.
For Requirement 2 - Before further flight.
This Airworthiness Directive becomes effective on 13 September 2001.
Boeing 767 Series Aeroplanes
AD/B767/155 (Continued)
Background: The United States Federal Aviation Administration has received a report of a fire in a 767-300 series aeroplane during routine maintenance. As the maintenance crew attempted to apply external electrical power to the airplane, fire erupted in the forward electrical/electronics bay, below the P37 miscellaneous electrical equipment panel. The source of the fire was traced to chafing and subsequent arcing of power wires belonging to electrical power wire bundle W298, routed from the P32 R generator power panel to the P37 panel. A stringer and a web were severely damaged and required replacing. Some of the wires were severed, and the insulation blanket was burned. Routing of the bundle under the blanket violates wire bundle installation and routing requirements.
This Directive requires a one-time inspection to detect abrasion damage and installation discrepancies of the wire bundles located below the P37 panel and, if necessary, corrective action. This action is necessary to detect and correct such damage and other discrepancies, which could result in arcing to structure and consequent fire or loss of function of affected systems.
Eugene Paul Holzapfel
Delegate of the Civil Aviation Safety Authority 5 September 2001
The above AD is notified in the Commonwealth of Australia Gazette on 12 September 2001