AD/B747/99 - Differential Protection Current Transformers - Wiring

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au F2006B03277 In force Legislative Instrument

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 


Boeing 747 Series Aeroplanes

 

AD/B747/99 Differential Protection Current Transformers - Wiring

Applicability: As specified in the requirement document.

 

Requirement: Action in accordance with the Boeing Service Bulletin 747-24-2154.

 

Note: FAA AD 91-18-05 also refers.

 

Compliance: Prior to 18 March 1992.


12/91

 

Background: This AD is issued following a 747 Safety Assessment which demonstrated that the potential exists for a single fault to cause the loss of all normal sources of aircraft power. Compliance with this AD requires re-routing and adding shielded wiring associated with the differential protection current transformers in the P6 panel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.