Commonwealth legislation

AD/B747/233 - Horizontal Stabiliser Fuel Tank Wire Bundles

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Commonwealth

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legislative instrument

Plain English Summary

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This Directive requires operators of certain Boeing 747-400s (L/N 1162–1223 except 1174) with horizontal stabiliser fuel tanks to perform a one-time detailed visual inspection of wire bundles W4601 and W4602 per Boeing ASB 747-28A2232 Rev 1; if bundles are misrouted or damaged they must be rerouted or repaired before further flight. Inspections are due within 60 days. Aircraft operators bear inspection and repair costs and must adjust maintenance schedules; the stated aim is to correct an identified unsafe wiring condition.

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AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official source
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/B747/233 Horizontal Stabiliser Fuel T

AD/B747/233 Horizontal Stabiliser Fuel Tank Wire Bundles 10/2000

Applicability: Model 747-400 series aeroplanes having line numbers (L/N) 1162 through 1223, except L/N 1174; equipped with horizontal stabiliser fuel tanks.

Requirement: 1. Perform a one-time detailed visual inspection in accordance with Boeing Alert Service Bulletin (ASB) 747-28A2232, Revision 1, dated 22 June 2000 of wire bundles routed to the fuel tank transfer pumps in the horizontal stabiliser to determine if wire bundles W4601 and W4602 are routed correctly and to detect damage. If the wire bundles are routed correctly and no damage is detected, no further action is required by this Directive.

2. If either wire bundle is determined to be incorrectly routed, but damage is not detected, reroute the affected wire bundle in accordance with the ASB.

3. If any damage is detected (whether the wire bundles are routed properly or not), repair the affected wire bundle and route the wire bundle correctly, as applicable, in accordance with the ASB.

Inspections and corrective actions accomplished prior to the effective date of this Directive in accordance with Boeing ASB 747-28A2232, dated 2 March 2000, are acceptable for compliance with the applicable action specified in this amendment.

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."

Note 2: FAA AD 2000-15-02 Amdt 39-11831 refers.

Compliance: For Requirement 1 - Within 60 days after the effective date of this Directive.

For Requirement 2 - Before further flight. For Requirement 3 - Before further flight.

This Airworthiness Directive becomes effective on 5 October 2000.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

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/B747/233 Horizontal Stabiliser Fuel T AD/B747/233 Horizontal Stabiliser Fuel Tank Wire Bundles 10/2000

AD/B747/233 Horizontal Stabiliser Fuel Tank Wire Bundles 10/2000

Applicability: Model 747-400 series aeroplanes having line numbers (L/N) 1162 through 1223, except L/N 1174; equipped with horizontal stabiliser fuel tanks.

2. If either wire bundle is determined to be incorrectly routed, but damage is not detected, reroute the affected wire bundle in accordance with the ASB.

3. If any damage is detected (whether the wire bundles are routed properly or not), repair the affected wire bundle and route the wire bundle correctly, as applicable, in accordance with the ASB.