Commonwealth legislation

AD/HS 125/135 - Fire Protection Circuitry - Inspection of Blocking Diodes

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive requires owners/operators and maintenance organisations of specified BAe 125 series aeroplanes to inspect the blocking diodes for the “EXT FIRED” bottle‑gone indicators per Corporate Jets Ltd Service Bulletin S.B. 26‑33 (Accomplishment Instructions) by the stated deadline. Issued after reports of isolated diode failures, it aims to improve system integrity; inspection costs and any corrective work are borne by operators.

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Current sections

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AD/HS 125/135 - Fire Protection Circuitry - Inspection of Blocking Diodes

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 125/135 Fire Protection Circuitry - Inspection

of Blocking Diodes

4/93

Applicability: All series 125 aircraft identified in Corporate Jets Limited Service Bulletin S.B. 26-33 dated 8 December 1992.

Requirement: Action in accordance with the Accomplishment Instructions of Corporate Jets Limited Service Bulletin S.B. 26-33 dated 8 December 1992.

Note: This Service Bulletin has been classified as Mandatory by the CAA(UK), AD 012-12-92 refers.

Compliance: Prior to 1 May 1993.

Background: This Directive has been issued following reports of isolated cases of dormant failure of the blocking diodes associated with the ‘EXT FIRED’ (bottle gone) indicators.

Compliance with this Directive will provide improved system integrity.

Source text

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

1 AD/HS 125/135 - Fire Protection Circuitry - Inspection of Blocking Diodes