Commonwealth legislation

AD/SD3-60/56 - Air Conditioner System Wiring

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legislative instrument

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This Airworthiness Directive requires operators of Short SD3‑60 aeroplanes that installed Shorts Service Bulletin SD360‑21‑21 (Original Issue, Aug 1994) to rewire those aircraft in accordance with Shorts SB SD360‑21‑21 Revision 1 (June 1998). Compliance must be completed by 15 August 1999. It corrects a wiring change introduced by the original bulletin that prevented the generator-failure slave relay from energising and restoring load‑shedding busbars; the aircraft owner/operator bears the cost and work.

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AD/SD3-60/56 - Air Conditioner System Wiring

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Short SD3-60 Series Aeroplanes

AD/SD3-60/56 Air Conditioner System Wiring 7/99

Applicability: All SD3-60 aircraft that have incorporated Shorts Service Bulletin (SB) SD360-21-21 Original Issue dated August 1994.

Requirement: 1. If not previously accomplished, rewire the aeroplane in accordance with Shorts SB SD360-21-21 Revision 1 dated June 1998.

Note: CAA(UK) AD 011-03-99 and Shorts Mandatory Service Bulletin SD360-21-23 dated 4 March 1999 refers.

Compliance: 1. Before 15 August 1999.

This Airworthiness Directive becomes effective on 15 July 1999.

Background: Incorporation of Shorts SB SD360-21-21 Original Issue resulted in wiring changes that inhibited the generator failure slave relay from being energised, this resulted in both load shedding busbars not being able to be brought back on line when override is selected.

Rewiring in accordance with Revision 1 of the service bulletin restores correct operation of the generator failure slave relay.

Source text

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

1 AD/SD3-60/56 - Air Conditioner System Wiring