Commonwealth legislation

AD/HS 125/169 - Wheel Tie-Bolt Nuts

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legislative instrument

Plain English Summary

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This directive requires operators of specified BAe/Hawker 125-series aircraft to inspect main landing-gear wheels for the tie-bolt nut part number and, if NAS1804 nuts are fitted, replace them with approved FN22A524 or specified Dunlop nuts before further flight. It applies to the models and serials listed in Raytheon MSB 32-3522 (including Hawker 800XP up to SN 258581) and must be completed within 10 landings or 12 days after 7 May 2003. Operators bear inspection and replacement costs and any resulting downtime.

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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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British Aerospace BAe 125 Series Aeroplanes

AD/HS 125/169 Wheel Tie -Bolt Nuts 6/200

AD/HS 125/169 Wheel Tie -Bolt Nuts 6/2003 DM

Applicability: Models DH.125 Series, BH.125 Series, HS.125 Series, and BAe.125 Series aircraft, as listed in Raytheon Mandatory Service Bulletin (MSB) 32-3522, dated September 2002.

Model Hawker 800XP aircraft, with serial numbers up to and including serial number 258581; equipped with Dunlop wheels part numbers AH51909, AH52075, AH52286, AH52206, AHA1287, AHA1606, or AHA1814.

Requirement: Inspect the main landing gear wheels to determine the part numbers of the tie-bolt nuts, in accordance with Raytheon MSB 32-3522.

If any part number NAS1804 tie-bolt nut is found installed, before further flight, replace the nut with a new part number FN22A524 tie-bolt nut (or a new Dunlop tie- bolt nut part number H5227C-5CW, SN407C-054, or LH13318-5, which are authorised by Ra ytheon); in accordance with MSB 32-3522.

Note: FAA AD 2003-07-07 refers

Compliance: Within 10 landings or 12 days after 7 May 2003, whichever occurs first.

This Airworthiness Directive becomes effective on 7 May 2003.

Background: The FAA requires certain actions intended to prevent separation of a main landing gear wheel due to loose or missing tie-bolts or tie-bolt nuts, with consequent damage to aircraft structure or systems, decompression, loss of full braking ability, or injury to personnel on the ground.

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David Villiers

Delegate of the Civil Aviation Safety Authority 1 May 2003

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Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

British Aerospace BAe 125 Series Aeroplanes

AD/HS 125/169 Wheel Tie -Bolt Nuts 6/200 AD/HS 125/169 Wheel Tie -Bolt Nuts 6/2003 DM

AD/HS 125/169 Wheel Tie -Bolt Nuts 6/2003 DM

Applicability: Models DH.125 Series, BH.125 Series, HS.125 Series, and BAe.125 Series aircraft, as listed in Raytheon Mandatory Service Bulletin (MSB) 32-3522, dated September 2002.

Model Hawker 800XP aircraft, with serial numbers up to and including serial number 258581; equipped with Dunlop wheels part numbers AH51909, AH52075, AH52286, AH52206, AHA1287, AHA1606, or AHA1814.

Requirement: Inspect the main landing gear wheels to determine the part numbers of the tie-bolt nuts, in accordance with Raytheon MSB 32-3522.

Note: FAA AD 2003-07-07 refers

Compliance: Within 10 landings or 12 days after 7 May 2003, whichever occurs first.

This Airworthiness Directive becomes effective on 7 May 2003.

David Villiers

Delegate of the Civil Aviation Safety Authority 1 May 2003