Commonwealth legislation

AD/B747/304 - Wing Rear Spar Upper Chord and Splice Fitting Structure

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

Requires repetitive inspections of the wing rear spar upper chord and splice fittings on all Boeing 747-100/200/300/SR/SP series aircraft, following the technical actions of FAA AD 2004-03-09, with an optional modification that terminates the inspection cycle. It affects aircraft operators and maintenance organisations, who must perform inspections, corrective work or the terminating modification at their expense by the compliance times (effective 15 April 2004). The action responds to reported cracking that could reduce structural integrity and cause fuel leakage.

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AD/B747/304 - Wing Rear Spar Upper Chord and Splice Fitting Structure

COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source

AIRWORTHINESS DIRECTIVE

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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 CASR 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.

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Boeing 747 Series Aeroplanes

AD/B747/304 Wing Rear Spar Upper Chord and Splice Fitting

Structure

4/2004

Applicability: All Model 747-100, -100B, -100B SUD, -200B, -200F, -200C, -300, 747SR, and

747SP series aircraft.

Requirement: Action in accordance with the technical requirements of FAA AD 2004-03-09 Amdt 39-13453.

Note: Boeing Alert Service Bulletin 747-57A2314 Revision 1 refers.

Compliance: As specified in the Requirement document, with a revised effective date of 15 April 2004.

This Airworthiness Directive becomes effective on 15 April 2004.

Background: The manufacturer received reports of forty-three cracks found on eleven aircraft since 1989. This Directive requires repetitive inspections for discrepancies of the structure near and common to the upper chord and splice fittings of the rear spar of the wing.

An optional modification is provided which terminates the repetitive inspection requirement. Unless detected and corrected, cracking could result in loss of structural integrity of the aircraft and fuel leakage into the wheel well cavity.

Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.

David Villiers

Delegate of the Civil Aviation Safety Authority 5 March 2004

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 24 March 2004.

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Source text

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

1 AD/B747/304 - Wing Rear Spar Upper Chord and Splice Fitting Structure

COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

AIRWORTHINESS DIRECTIVE

Boeing 747 Series Aeroplanes

AD/B747/304 Wing Rear Spar Upper Chord and Splice Fitting

Structure

4/2004

Applicability: All Model 747-100, -100B, -100B SUD, -200B, -200F, -200C, -300, 747SR, and

747SP series aircraft.

Requirement: Action in accordance with the technical requirements of FAA AD 2004-03-09 Amdt 39-13453.

Note: Boeing Alert Service Bulletin 747-57A2314 Revision 1 refers.

Compliance: As specified in the Requirement document, with a revised effective date of 15 April 2004.

This Airworthiness Directive becomes effective on 15 April 2004.

David Villiers

Delegate of the Civil Aviation Safety Authority 5 March 2004

The above AD is notified in the Commonwealth of Australia Gazette on 24 March 2004.

Page 1 of 1