Commonwealth legislation

AD/B747/223 - Diagonal Brace Underwing Fitting Bolts

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Boeing 747‑100, ‑200 and 747SP aircraft (line numbers 1–567) fitted with aluminium diagonal brace underwing fittings to carry out initial and repeat inspections and to replace taperlock bolts as directed. It cross‑references FAA AD 2000‑03‑22 and related Boeing service bulletins. The rule targets a corrosion and stress‑cracking risk to underwing fitting bolts that, if uncorrected, can remove the load path and risk engine/strut separation.

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/B747/223 - Diagonal Brace Underwing Fitting Bolts.

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/B747/223 Diagonal Brace Underwing Fit

AD/B747/223 Diagonal Brace Underwing Fitting Bolts 5/2000

Applicability: Model 747-100, -200, and 747SP series aircraft, with line numbers 1 through 567, and equipped with aluminium diagonal brace underwing fittings.

Requirement: Inspect in accordance with the technical requirements of FAA AD 2000-03-22 Amdt 39-11582.

Note: Boeing Service Bulletins 747-53A2308 and 747-57-2288 Revision 1 refer.

Compliance: As specified in the Requirement document for the initial and repetitive inspections and eventual bolt replacement, with a revised effective date of 18 May 2000.

This Airworthiness Directive becomes effective on 18 May 2000.

Background: The FAA received reports of damaged, broken, and corroded taperlock bolts of the engine strut diagonal brace underwing fittings on the outboard strut due to stress corrosion cracking. Loss of the underwing fitting load path due to missing, damaged, or broken taperlock bolts, could result in separation of the engine and strut from the aircraft.

Signature of Bernard Malcolm Hole, Delegate of the Civil Aviation Safety Authority.

Bernard Malcolm Hole

Delegate of the Civil Aviation Safety Authority 31 March 2000

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 19 April 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/B747/223 Diagonal Brace Underwing Fit AD/B747/223 Diagonal Brace Underwing Fitting Bolts 5/2000

AD/B747/223 Diagonal Brace Underwing Fitting Bolts 5/2000

Applicability: Model 747-100, -200, and 747SP series aircraft, with line numbers 1 through 567, and equipped with aluminium diagonal brace underwing fittings.

Requirement: Inspect in accordance with the technical requirements of FAA AD 2000-03-22 Amdt 39-11582.

Note: Boeing Service Bulletins 747-53A2308 and 747-57-2288 Revision 1 refer.

Compliance: As specified in the Requirement document for the initial and repetitive inspections and eventual bolt replacement, with a revised effective date of 18 May 2000.

This Airworthiness Directive becomes effective on 18 May 2000.

Bernard Malcolm Hole

Delegate of the Civil Aviation Safety Authority 31 March 2000

The above AD is notified in the Commonwealth of Australia Gazette on 19 April 2000.