Commonwealth legislation

AD/HS 125/151 Amdt 1 - APU Fuel Feed Hose Assemblies

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This Directive requires operators of BAe 125 Series 1000A/1000B and Hawker 1000 aircraft (post Mod 259722C) to inspect the APU fuel feed hose assembly and to replace the vinyl conduit with convoluted PTFE tubing in line with the manufacturer’s service bulletins. Replacement within 200 flight hours ends the recurring inspection requirement.

Operators pay for and schedule the inspections and modification and must record compliance. The stated safety aim is to prevent heat damage from leaking bleed air that could lead to an in‑flight fire.

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AD/HS 125/151 Amdt 1 - APU Fuel Feed Hose Assemblies

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 125/151

Amdt 1

APU Fuel Feed Hose Assemblies 13/96

Applicability: All BAe 125 series 1000A, 1000B and Hawker 1000 aircraft Post Mod 259722C (Introduction of Turbomach APU).

Requirement 1. Inspect the APU fuel feed hose assembly, in accordance with Hawker Raytheon Corporate Jets Mandatory Inspection Service Bulletin SB 49-44 Revision 1.

Note: CAA (UK) AD 004-01-95 and FAA AD 95-10-01 refer.

Replace the vinyl conduit on the APU fuel feed hose assembly with convoluted PTFE tube, in accordance with Hawker Service Bulletin SB.49-47-25A825A (Modification No. 25A825A).

Compliance: Requirement 1: Unless previously accomplished, with an effective date of 31 May 1995 and thereafter at the periods specified in the manufacturers maintenance schedules.

Requirement 2: Within 200 flight hours with an effective date of 5 December 1995.

Compliance with Requirement 2 provides terminating action for the inspections in Requirement 1.

This Amendment is effective from 5 December 1996.

Background: The aircraft manufacturer has advised that APU feed hoses have sustained heat damage due to impingement of hot bleed air leaking from adjacent pneumatic components.

Complete failure of the APU hoses could result in an in-flight fire.

This amendment is raised to provide terminating action to the Directive.

The original issue of this Airworthiness Directive became effective on 31 May 1995.

Source text

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

1 AD/HS 125/151 Amdt 1 - APU Fuel Feed Hose Assemblies