Commonwealth legislation

AD/HS 125/145 - Electrical Wiring Chafing

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legislative instrument

Plain English Summary

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This AD makes compliance with the manufacturer’s Mandatory Service Bulletin SB A29‑92 Rev 1 compulsory for the BAe 125/Hawker 1000 aeroplanes identified in that bulletin, requiring the specified inspections and repairs to address electrical‑loom chafing against a hydraulic pipe. It affects owners/operators (who must pay for parts, labour and downtime) and aims to reduce the risk of hydraulic pressure loss, electrical faults or in‑flight fire by turning the bulletin into a regulator‑enforced obligation.

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AD/HS 125/145 - Electrical Wiring Chafing

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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British Aerospace BAe 125 Series Aeroplanes

AD/HS 125/145 Electrical Wiring Chafing 11/94

Applicability: Hawker 1000 and BAe 125 Series 1000A and B aircraft identified in Hawker Raytheon Corporate Jets Mandatory Service Bulletin SB A29-92 Revision 1 dated 1 August 1994.

Requirement: If not previously accomplished, action in accordance with Hawker Raytheon Corporate Jets Mandatory Service Bulletin SB A29-92 Revision 1 dated 1 August 1994.

Note: This Service Bulletin has been classified as mandatory by the CAA(UK).

Compliance: Prior to 30 October 1994.

Background: The aircraft manufacturer has received reports of chafing of an electrical cable/loom on a hydraulic pipe, this caused an insulation breakdown and electrical short circuit which produced a pin-hole failure of the hydraulic pipe. Action required by this Directive is designed to decrease the likelihood of a loss of hydraulic pressure, electrical malfunction or an in-flight fire.

Source text

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

1 AD/HS 125/145 - Electrical Wiring Chafing