COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 107
CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes
Airworthiness Directive (AD) AD/ELECT/11 and issues the following AD under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in
the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product
mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the
requirement section; and (c) at the time mentioned in the compliance section.
Electrical Equipment
AD/ELECT/11 Leach Relays - Control Terminal Insulation 2/2009
Amdt 1
Applicability: Applicability: All Leach type 5038, 5039, 5058, 5059, 5060, 5061 relays.
Requirement: Modify relays by increasing the insulation between the coil terminals and both the
main contactor bar and the earthed metal yoke of the coil.
An approved method of compliance is as follows:
1. Remove the two coil terminal screw assemblies.
2. Form a piece of 3 in. x 3 in. fibrous insulating sheet of 0.015 inch minimum
thickness into a hat section so that the hollow portion can fit over the existing
insulated terminal strip, with the remaining portions bearing against the moulded
cover and the metal yoke respectively, so as to provide an equal overhang of
Insulation at each end of the terminal strip. Cut a suitable hole to permit the
passage of the coil end wires through the new insulation and cut appropriate
holes in the hat section to correspond with the existing holes in the terminal strip.
Varnish the formed strip.
3. Place the completed hat section in position and pass the coil wires through the
appropriate hole. Replace the coil terminal assemblies at the same time
connecting up the coil wires and clamping the new insulation firmly in place on
each side of the terminal strip.
Note: Compliance with previous issue of this AD constitutes compliance with this
AD.
Compliance: Before installation in an aircraft.
This Amendment becomes effective on 12 February 2009.
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 107
CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Electrical Equipment
AD/ELECT/11 Amdt 1 (continued)
Background: This AD was originally issued on 1 January 1963 and is now amended to remove
reference to ANO 107.2.6.2.1 which has since been cancelled.
James Coyne
Delegate of the Civil Aviation Safety Authority
22 December 2008
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